tyrant bird vs peewee

tyrant bird and peewee both are nouns.

Word	Noun	Adjective	Verb	Adverb
tyrant bird	Yes	No	No	No
peewee	Yes	No	No	No

As nouns, peewee is a hyponym of tyrant bird; that is, peewee is a word with a more specific, narrower meaning than tyrant bird:

tyrant bird: large American birds that characteristically catch insects on the wing
peewee: small olive-colored woodland flycatchers of eastern North America

tyrant bird (noun)	peewee (noun)
large American birds that characteristically catch insects on the wing	small olive-colored woodland flycatchers of eastern North America
	disparaging terms for small people