trawler vs fishing smack

trawler and fishing smack both are nouns.

Word	Noun	Adjective	Verb	Adverb
trawler	Yes	No	No	No
fishing smack	Yes	No	No	No

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

trawler: a fishing boat that uses a trawl net or dragnet to catch fish
fishing smack: a vessel for fishing; often has a well to keep the catch alive

Other hypernyms of trawler include fishing boat, fishing vessel.

trawler (noun)	fishing smack (noun)
a fishing boat that uses a trawl net or dragnet to catch fish	a vessel for fishing; often has a well to keep the catch alive
a fisherman who use a trawl net