tighten vs trammel

tighten is not a noun while trammel is a noun.

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

As verbs, trammel is a hypernym of tighten; that is, trammel is a word with a broader meaning than tighten:

Other hypernyms of tighten include bound, confine, limit, restrict, throttle.

As verbs, trammel is a hypernym of tighten; that is, trammel is a word with a broader meaning than tighten:

Other hypernyms of tighten include bound, confine, limit, restrict, throttle.

tighten (noun)	trammel (noun)
	a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)
	a restraint that is used to teach a horse to amble
	an adjustable pothook set in a fireplace
	a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh

tighten (verb)	trammel (verb)
become tight or tighter	place limits on (extent or amount or access)
make tight or tighter	catch in or as if in a trap
severely restrict in scope or extent
narrow or limit