ascertain vs cinch

ascertain is not a noun while cinch is a noun.

Word	Noun	Adjective	Verb	Adverb
ascertain	No	No	Yes	No
cinch	Yes	No	Yes	No

As verbs, cinch is a hyponym of ascertain; that is, cinch is a word with a more specific, narrower meaning than ascertain:

Other hyponyms of ascertain include proof, proofread, control, double-check, cross-check, card, spot-check, cover.

ascertain (noun)	cinch (noun)
	a form of all fours in which the players bid for the privilege of naming trumps
	any undertaking that is easy to do
	stable gear consisting of a band around a horse's belly that holds the saddle in place

ascertain (verb)	cinch (verb)
be careful or certain to do something; make certain of something	get a grip on; get mastery of
learn or discover with certainty	make sure of
find out, learn, or determine with certainty, usually by making an inquiry or other effort	tie a cinch around
establish after a calculation, investigation, experiment, survey, or study