tighten vs constringe

tighten and constringe both are verbs.

Word	Noun	Adjective	Verb	Adverb
tighten	No	No	Yes	No
constringe	No	No	Yes	No

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

Other hyponyms of tighten include constrict, narrow, firm, tauten, compact, compress, constrict, contract, press, squeeze, strain, tense.

tighten (verb)	constringe (verb)
become tight or tighter	become tight or as if tight
make tight or tighter
severely restrict in scope or extent
narrow or limit