dory vs rowing boat

dory and rowing boat both are nouns.

Word	Noun	Adjective	Verb	Adverb
dory	Yes	No	No	No
rowing boat	Yes	No	No	No

As nouns, rowing boat is a hyponym of dory; that is, rowing boat is a word with a more specific, narrower meaning than dory:

dory: a small boat of shallow draft with cross thwarts for seats and rowlocks for oars with which it is propelled
rowing boat: a rowboat

Other hyponyms of dory include wherry.

dory (noun)	rowing boat (noun)
marine fishes widely distributed in mid-waters and deep slope waters	a rowboat
pike-like freshwater perches
a small boat of shallow draft with cross thwarts for seats and rowlocks for oars with which it is propelled