cave.noun,.plural.caves
a hollow or natural passage under or into the Earth with an opening or openings to the surface or outside
cave, caved, caving, caves.verbs
transitive verb use.to dig or hollow out; to cause to collapse or yield; to crumple or smash (the top of the car was caved in by the impact of the tree falling on it)
intransitive verb use.to fall in; collapse (the flimsy walls caved in during an Earthquake); to give up all opposition; yield (the school committee finally caved in to the demands of parents and teachers; to explore caves
caver.noun,.plural.cavers

crumple, crumpled, crumpling, crumples.verbs
transitive verb use.to crush together or press into wrinkles; rumple; to cause to fall apart
intransitive verb use.to become wrinkled; to fall apart; collapse (from wear over time, the old building on the farm crumpled down)
crumple.noun
an irregular fold, crease or wrinkle
crumply.adjective

crush, crushed, crushing, crushes.verbs
transitive verb use.to press between opposing bodies so as to break it; to crush something means to press it very hard so that its shape is destroyed or so that it breaks into pieces (Andrew crushed his empty can); to break, pound or grind stone or ore, for example, into small fragments or powder; to crumple or rumple (crushed the freshly ironed shirt trying to stuff it into a to small of a bag); to extract or obtain by pressing or squeezing (crush juice from a grape)
intransitive verb use.to be or become crushed; to proceed or move by crowding or pressing
crush.noun
the act of crushing; extreme pressure; the state of something being crushed (old vehicles are crushed to make a package of metal small and therefor easier to ship to factories for remaking into something new); a great crowd (a crush of spectators); a substance prepared by or as if by crushing, especially a fruit drink (orange crush); a usually temporary infatuation; the process of stamping or crushing grapes for wine
crushable.adjective
crusher.noun
crushproof.adjective
items that may incur damage during shipping are usually sent in crushproof containers

chubby, chubbier, chubbiest.adjectives
rounded and plump; fat; a porker
chubbily.adverb
chubbiness.noun

cruse.noun
a small Earthenware container, such as a pot or jar, for holding liquids

chamber, chambered, chambering, chambers.transitive verbs
enclose or confine; to be of the mind for frivolous sexual activity, lewd.immodest.behavior and licentious.indulgences (chambering can refer to whoredoms and prostitutions of every kind); to put in or as if in a chamber
chamber.noun,.plural.chambers
an enclosed space or compartment (the chamber of a pump; a compression chamber); a room in a house, especially a bedroom (the bed chamber); a room where a person receives visitors; a hall for the meetings of a legislative or other assembly; a legislative or judicial body; a board or council; a room in which a judge may consult privately with attorneys or hear cases not taken into courtan enclosed space in the body of an organism; a cavity (the four chambers of the heart); a compartment in a firearm, as in the breech of a rifle or the cylinder of a revolver, that holds the cartridge in readiness for firing; an enclosed space in the bore of a gun that holds the charge; a suite of rooms, especially one used by lawyers

chamberlain.noun,.plural.chamberlains
a man or woman appointed to manage the household of a sovereign or a noble; a chief.steward; a high-ranking official in various royal courts; an official who receives the rents and fees of a municipality; a treasurer

chambermaid.noun
a maid who cleans and cares for bedrooms, as in a hotel

cancelation.(old 'cancellation').noun
the act or an instance of canceling; something canceled, especially a released accommodation or an unfilled appointment
cancel, canceled.(old 'cancelled'), canceling, cancels.verbs
transitive verb use.to cross out with lines or other marking; erase; to annul or invalidate; to mark or perforate a postage stamp or check, for example, to indicate that it may not be used again; to equalize or make up for; offset (today's decline in stock price canceled out yesterday's gain); to delete
intransitive verb use.to stop the effect of something; to neutralize one another; counterbalance (two opposing forces that canceled out; if you cancel something that has been arranged, you stop it from happening; if you cancel an order for goods or services, you tell the person or organization supplying them that you no longer wish to receive them
cancel.noun
the act or an instance of canceling; a cancelation
cancelable.adjective
canceler.noun

cogitation.noun,.plural.cogitations
thoughtful consideration; meditation; serious thought; a carefully considered reflection
cogitate, cogitated, cogitating, cogitates.intransitive and transitive verbs to take careful thought or think carefully about; ponder; think
cogitable.adjective
thinkable; conceivable: 
cogitative.adjective
of or relating to cogitation; inclined to or ccapable of cogitation
cogitatively.adverb
cogitativeness.noun
cogitator.noun,.plural.cogitators

cheerful.adjective
being in good spirits; merry; glad; promoting a feeling of cheer; pleasant (a cozy, cheerful room); reflecting willingness or good humor (cheerful work it is working in the garden on a sunny day) cheerfully.adverb
cheerfulness.noun
cheer.noun,.plural.cheers
lightness of spirits or mood; gaiety or joy (a happy tune, full of cheer); a source of joy or happiness; comfort; a shout of approval, encouragement.or.congratulation; a short, rehearsed jingle or phrase, shouted in unison by a squad of cheerleaders;  festive food and drink; refreshment (Christmas cheer)
cheery, cheerier, cheeriest.adjectives
showing or suggesting.good.spirits; cheerful (a cheery hello) 
cheerily.adverb
cheeriness.noun
cheer, cheered, cheering, cheers.verbs
transitive verb use.to make happier or more cheerful (a warm fire that cheered us); to encourage with or as if with cheers; urge (the fans cheered the runners on); to salute or acclaim with cheers; applaud
intransitive verb use.to shout cheers; to become cheerful (had lunch and soon cheered up)
cheeringly.adverb
cheerer.noun,.plural.cheerers

cornea.noun,.plural.corneas
transparent tissue forming the outer coat of the eyeball and covering the iris and the pupil; the transparent, convex, anterior portion of the outer fibrous coat of the eyeball that covers the iris and the pupil and is continuous with the sclera

clutter.noun
a confused or disordered.state or collection; a jumble; a mess (a cluttered room; clutter in the attic); a clatter
clutter, cluttered, cluttering, clutters.verbs
transitive verb use.to litter or pile in a disordered manner (tools and boxes cluttered the garage; I cluttered up my files with clippings)
intransitive verb use.to run or move with bustle and confusion; to make a clatter

crux.noun,.plural.cruxes.or.cruces
the basic, central or critical point or feature (the crux of the matter; the crux of an argument)

chiasma.also.chiasm.noun,.plural.chiasmata.or.chiasmas.also chiasms
in anatomy, a crossing or intersection of two tracts, as of nerves or ligaments; in genetics, the point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over
chiasmal.or.chiasmic.or.chiasmatic.adjective

chromatid.noun,.plural.chromatids
either of the two daughter strands of a duplicated.chromosome that are joined by a single centromere and separate during cell division to become individual chromosomes

centromere.noun,.plural.centromeres
the most condensed and constricted.region of a chromosome to which the spindle.fiber is attached during mitosis
centromeric.adjective

combustion.noun,.plural.combustions
the process of burning; a chemical change, especially oxidation,.accompanied by the production of heat and light
combustive.adjective
combustible.adjective
capable of igniting and burning; easily aroused or excited (he is not nearly as combustible as he once was)
combustible.noun,.plural.combustibles
a substance that ignites and burns readily
combustibility.noun,.plural.combustibilities
combustibly.adverb

internal combustion engine.noun,.plural.internal combustion engines
an engine that produces.power by burning gasoline, used in most cars; an internal combustion engine is an engine that creates its energy by burning fuel inside itself (most cars have internal combustion engines); an internal combustion engine is a heat engine in which the combustion that generates the heat takes place inside the engine proper instead of in a furnace
an engine, such as an automotive gasoline piston engine or a diesel, in which fuel is burned within the engine proper rather than in an external furnace, as in a steam engine; date of word creation was 1884

cylindrical.also.cylindric.adjective
of.relating.to.or.having the shape of a cylinder, especially of a circular cylinder; semicylindrical
Mathematics:.of.or.relating.to the.coordinate.system or to any of three coordinates in it, formed by two polar coordinates in a plane and a rectangular coordinate measured perpendicularly from the plane
cylindrically.adverb
cylindricality.noun
cylinder.noun,.plural.cylinders
a cylindrical container or object
Mathematics:.the surface generated by a straight line intersecting and moving along a closed plane curve, the directrix, while remaining parallel to a fixed straight line that is not on or parallel to the plane of the directrix; the portion of such a surface bounded by two parallel planes and the regions of the planes bounded by the surface; a solid bounded by two parallel planes and such a surface, especially such a surface having a circle as its directrix
Engineering:.the chamber in which a piston of a reciprocating engine moves; the chamber of a pump from which fluid is expelled by a piston; the rotating chamber of a revolver that holds the cartridges; any of several rotating parts in a printing press, especially one that carries the paper
Archaeology:.a cylindrical stone or clay object with an engraved design or inscription; from Latin 'cylindrus' and from Greek 'kulindros' from the Greek base 'kulindein', meaning 'to roll'

cinder.noun,.plural.cinders
a burned or partly burned substance, such as coal, that is not reduced to ashes but is incapable of further.combustion; a partly charred substance that can burn further but without flame; scoria
cinder, cindered, cindering, cinders.transitive verbs
to burn or reduce to cinders
cindery.adjective