trawl line vs fishing line

trawl line and fishing line both are nouns.

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

As nouns, fishing line is a hypernym of trawl line; that is, fishing line is a word with a broader meaning than trawl line:

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

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