dragger vs fishing vessel

dragger and fishing vessel both are nouns.

Word	Noun	Adjective	Verb	Adverb
dragger	Yes	No	No	No
fishing vessel	Yes	No	No	No

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

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

Other hypernyms of dragger include fishing boat, fishing smack.

dragger (noun)	fishing vessel (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
someone who pulls or tugs or drags in an effort to move something