phoebe vs tyrant flycatcher

phoebe and tyrant flycatcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
phoebe	Yes	No	No	No
tyrant flycatcher	Yes	No	No	No

As nouns, tyrant flycatcher is a hypernym of phoebe; that is, tyrant flycatcher is a word with a broader meaning than phoebe:

phoebe: small dun-colored North American flycatcher
tyrant flycatcher: large American birds that characteristically catch insects on the wing

Other hypernyms of phoebe include flycatcher, New World flycatcher, tyrant bird.

phoebe (noun)	tyrant flycatcher (noun)
small dun-colored North American flycatcher	large American birds that characteristically catch insects on the wing