fishing net vs trammel

fishing net and trammel both are nouns.

Word	Noun	Adjective	Verb	Adverb
fishing net	Yes	No	No	No
trammel	Yes	No	Yes	No

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

fishing net: a net that will enclose fish when it is pulled in
trammel: a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh

Other hyponyms of fishing net include drift net, gill net, landing net, seine, trammel net, dragnet, trawl, trawl net.

fishing net (noun)	trammel (noun)
a net that will enclose fish when it is pulled in	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

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