pewit vs New World flycatcher

pewit and New World flycatcher both are nouns.

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

As nouns, New World flycatcher is a hypernym of pewit; that is, New World flycatcher is a word with a broader meaning than pewit:

pewit: small olive-colored woodland flycatchers of eastern North America
New World flycatcher: large American birds that characteristically catch insects on the wing

Other hypernyms of pewit include flycatcher, tyrant bird, tyrant flycatcher.

pewit (noun)	New World flycatcher (noun)
large crested Old World plover having wattles and spurs	large American birds that characteristically catch insects on the wing
small olive-colored woodland flycatchers of eastern North America
small black-headed European gull