fish vs trawl

fish and trawl both are nouns.

Word	Noun	Adjective	Verb	Adverb
fish	Yes	No	Yes	No
trawl	Yes	No	Yes	No

As verbs, trawl is a hyponym of fish; that is, trawl is a word with a more specific, narrower meaning than fish:

Other hyponyms of fish include crab, seine, scallop, scollop, rail, brail, angle, shrimp, net fish, shark, still-fish, prawn.

fish (noun)	trawl (noun)
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills	a conical fishnet dragged through the water at great depths
the flesh of fish used as food	a long fishing line with many shorter lines and hooks attached to it (usually suspended between buoys)

fish (verb)	trawl (verb)
catch or try to catch fish or shellfish	fish with trawlers
seek indirectly