tyrant bird vs New World flycatcher

tyrant bird and New World flycatcher both are nouns.

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

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

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

Other synonyms of tyrant bird include flycatcher, tyrant flycatcher.

tyrant bird (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