vessel vs shrimper

vessel and shrimper both are nouns.

Word	Noun	Adjective	Verb	Adverb
vessel	Yes	No	No	No
shrimper	Yes	No	No	No

As nouns, shrimper is a hyponym of vessel; that is, shrimper is a word with a more specific, narrower meaning than vessel:

vessel (noun)	shrimper (noun)
a craft designed for water transportation	a vessel engaged in shrimping
an object used as a container (especially for liquids)
a tube in which a body fluid circulates