cortex.noun, plural.cortices or cortexes
the outer layer of gray matter that covers the surface of the cerebral hemisphere

cosmic rays.noun
You hear them when you are tuning between stations on your radio. They are the nuclei of atoms streaking through our Milky Way Galaxy at speeds close to the speed of light, most of them being protons, the nuclei of the lightest form of hydrogen. Ten thousand of their fragments will touch you by the time you finish reading about them here. They are rays of extremely short wave length, and can safely be called ultragamma rays. Their radioactive decay shows them to be about 10 million years old. They are natives of our Milky Way Galaxy. These rays are ordinary atoms that get supercharged to ultra high speeds and energy. We think these rays get their boost from supernova explosions, and surely the photons have a considerable effect too, but no one is sure of their origination, or of the amount of effect of sources affecting them. The true source of the power to energize these rays and the source of the atoms remains unknown, except for believing God did it:.Hebrews 1:3 ".....and upholding all things by the word of his power....." Proverbs 26:10 "The great God that formed all things....." Isaiah 44:24 ".....I am the LORD that makes all things; that stretches forth the heavens alone; that spreads abroad the earth by myself." Colossians 1:16,17 "For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers. All things were created by him, and for him...And he is before all things, and by him all things consist."

cosmos.noun
the integrated, harmonious Universe; a systematic whole held to arise by and persist through the direct intervention of divine power

cosmic.also.cosmical.adjectives
of or relating to the Universe, especially as distinct from Earth; infinitely or inconceivably extended; vast
cosmically.adverb

cosmology.noun
the study of the origin and structure of the physical Universe
cosmologic or cosmological.adjective
cosmologically.adverb
cosmologist.noun

countercheck.noun
something that serves to check, restrict, or limit something else; something that confirms or denies the correctness of a previous check
countercheck, counterchecked, counterchecking, counterchecks.transitive verbs
to check again in order to verify

covalent.noun
a chemical bond forms when two atoms contributes an electrons to share between them; a strong force of attraction holds these atoms together in a molecule or crystal
covalency.noun
covalent.adjective
covalently.adverb

covalent bond.noun
a chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms

covet, coveted, coveting, covets.verbs
transitive verb use.crave, desire ardently; to feel blameworthy desire for that which is another's; envy; to wish for longingly; to feel immoderate desire for that which is another's
covetable.adjective
coveter.noun
covetingly.adverb

creed.noun
a formal statement of religious belief; a confession of faith; a system of belief, principles, or opinions

credo.noun, plural.credos
a creed.(the Christian Creed)

credence.noun 
mental acceptance as true or real (give credence to gossip); credibility; credentials

credential.adjective
that which entitles to credit, confidence, etc.

credible.adjective
being credible; worthy of belief or trust; credible is used of that which is believable, because it is supported by evidence, sound logic, etc. 
credibility.noun
credibly.adverb
in a credible manner

credulous.adjective
ready to believe especially on slight or uncertain evidence; proceeding from credulity 
credulousness.noun
credulously.adverb
antonym.incredulous

credulity.noun
a disposition to believe too readily

complicit.adjective
associated with or participating in a questionable act or a crime; having complicity (media complicit with the propaganda arm of a dictatorship)

complicity,.noun,.plural.complicities
involvement as an accomplice in a questionable act or a crime

criterion.noun
inflected form(s).plural.criteria.also.criterions
a standard on which a judgment or decision may be based; a characterizing mark or trait
synonym.standard
usage-the plural criteria is often used erroneously as a singular ("let me now return to the third criteria" – R. M. Nixon)
criterial.adjective

courteous.adjective
characterized by gracious consideration toward others; polite; respectful
courteously.adverb
courteousness.noun

courtesy.noun,.plural.courtesies
polite behavior; a polite gesture or remark; consent or agreement in spite of fact; indulgence (they call this pond a lake by courtesy only); willingness or generosity in providing something needed (free advertising through the courtesy of the local newspaper)
courtesy.adjective
given or done as a polite gesture (paid a courtesy visit to the new neighbors); free of charge

commonality.noun,.plural.commonalities
the possession, along with another or others, of a certain attribute or set of attributes

common, commoner, commonest.adjectives
belonging equally to or shared equally by two or more; joint  (common interests); of or relating to the community as a whole; public (for the common good); widespread; prevalent; usual; most widely known; ordinary (the common housefly); having no special designation, status, or rank; standard (common procedure)
common.noun
the common people; commonalty; commons (used with a singular or plural verb) the political class composed of commoners; the parliamentary representatives of this class.; often Commons; see House of Commons
in common.idiom
equally with or by all
commonly.adverb
commonness.noun

commonplace.adjective
having no remarkable features, characteristics, or traits; ordinary
commonplace.noun
a trite or obvious remark; a platitude; cliché

cabal.noun
a conspiratorial group of plotters or intriguers (a cabal of men, working secretly to make legal that which is unthinkable to the general population); a secret scheme or plot
intransitive use.cabal, caballed, caballing, cabals
to form a cabal; conspire

congenial.adjective
having the same tastes, habits, or temperament; sympathetic; of a pleasant disposition; friendly and sociable (a congenial host and hostess); agreeable (congenial surroundings)
congeniality.or.congenialness.noun
congenially.adverb

cusp.noun
a point or pointed end; a transitional point or time, as between two astrological signs; a triangular fold or flap of a heart valve
Anatomy.-.a pointed or rounded projection on the chewing surface of a tooth
Architecture.-.the point of intersection of two ornamental arcs or curves, such as the inner points of a trefoil
Astronomy.-.either point of a crescent moon
Mathematics.-.a point at which a curve crosses itself and at which the two tangents to the curve coincide