phoebe bird vs flycatcher

phoebe bird and flycatcher both are nouns.

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

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

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

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

phoebe bird (noun)	flycatcher (noun)
small dun-colored North American flycatcher	any of a large group of small songbirds that feed on insects taken on the wing
	large American birds that characteristically catch insects on the wing