pothook vs trammel

pothook and trammel both are nouns.

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

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

pothook (noun)	trammel (noun)
an S-shaped hook to suspend a pot over a fire	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

pothook (verb)	trammel (verb)
	place limits on (extent or amount or access)
	catch in or as if in a trap