C

calculate	circumvent	completion	consequently	convenient
calculation	cite	complex	consider	conveniently
call	claim	composition	considerable	convention
can	clarity	comprise	considerably	converge
cancel	class	computation	consideration	converse
capable	classic	computational	consist	conversely
capture	classical	compute	constant	convert
cardinality	clear	concept	constantly	convey
care	clearly	concern	constitute	core
carry	close	concise	constraint	corollary
case	closely	concisely	construct	correct
category	cluster	conclude	construction	correspond
cause	coefficient	conclusion	contain	correspondence
caution	coincidence	concrete	content	coset
centre	collect	condition	context	cost
certain	combination	conference	continue	could
certainly	combine	confine	continuous	count
change	come	confirm	continuum	counterexample
character	comment	confound	contradict	couple
characteristic	common	confusion	contradiction	course
characterization	commonly	conjecture	contrary	cover
characterize	companion	conjunction	contrast	criterion
check	compare	connect	contribute	critical
choice	comparison	connection	contribution	crucial
choose	compensate	consecutive	control	curiously
circle	complete	consequence	convenience	customary
circumstance	completeness