tannin vs cutch

tannin and cutch both are nouns.

Word	Noun	Adjective	Verb	Adverb
tannin	Yes	No	No	No
cutch	Yes	No	No	No

As nouns, cutch is a hyponym of tannin; that is, cutch is a word with a more specific, narrower meaning than tannin:

tannin: any of various complex phenolic substances of plant origin; used in tanning and in medicine
cutch: tannin extract derived from any of several mangrove barks of Pacific areas

Other hyponyms of tannin include kutch, catechin.

tannin (noun)	cutch (noun)
any of various complex phenolic substances of plant origin; used in tanning and in medicine	tannin extract derived from any of several mangrove barks of Pacific areas