dory vs small boat

dory and small boat both are nouns.

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

As nouns, small boat is a hypernym of dory; that is, small boat is a word with a broader meaning than dory:

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

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