catalyze
to cause or speed up a reaction
catastrophic
utterly disastrous
cease
to stop, halt
circumvent
to find a way around; avoid
cite
to quote or reference from a work to support an argument
coalesce
to come together to form a single mass
coarseness
roughness, harshness
collaboration
the act of working with another person or people
commonplace
common, ordinary
comprise
to include, contain
confine
to restrict within a limited area
confound
to utterly confuse, baffle
consensus
general agreement
conspicuous
clearly visible; noticeable
cosumption
the process of eating up or using up
contingent
dependent upon; subject to
contrive
to think up
copious
abundant; plentiful
credible
believable
credulous
easily fooled