draw the line vs trammel

draw the line is not a noun while trammel is a noun.

Word	Noun	Adjective	Verb	Adverb
draw the line	No	No	Yes	No
trammel	Yes	No	Yes	No

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

Other hypernyms of draw the line include bound, confine, limit, restrict, throttle.

draw the line (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

draw the line (verb)	trammel (verb)
reasonably object (to) or set a limit (on)	place limits on (extent or amount or access)
	catch in or as if in a trap