tyrant flycatcher vs New World flycatcher

tyrant flycatcher and New World flycatcher both are nouns.

Word	Noun	Adjective	Verb	Adverb
tyrant flycatcher	Yes	No	No	No
New World flycatcher	Yes	No	No	No

As nouns, tyrant flycatcher and New World flycatcher are synonyms defined as:

tyrant flycatcher and New World flycatcher: large American birds that characteristically catch insects on the wing

Other synonyms of tyrant flycatcher include flycatcher, tyrant bird.

tyrant flycatcher (noun)	New World flycatcher (noun)
large American birds that characteristically catch insects on the wing	large American birds that characteristically catch insects on the wing