insure vs cinch

insure is not a noun while cinch is a noun.

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

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

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

insure (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

insure (verb)	cinch (verb)
be careful or certain to do something; make certain of something	get a grip on; get mastery of
protect by insurance	make sure of
make certain of	tie a cinch around
take out insurance for