fishing line vs trawl

fishing line and trawl both are nouns.

Word	Noun	Adjective	Verb	Adverb
fishing line	Yes	No	No	No
trawl	Yes	No	Yes	No

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

fishing line: a length of cord to which the leader and float and sinker and hook are attached
trawl: a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys)

Other hyponyms of fishing line include hand line, handline, night-line, setline, spiller, trawl line, trotline, trolling line.

fishing line (noun)	trawl (noun)
a length of cord to which the leader and float and sinker and hook are attached	a conical fishnet dragged through the water at great depths
	a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys)

fishing line (verb)	trawl (verb)
	fish with trawlers