myrtle warbler vs wood warbler

myrtle warbler and wood warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
myrtle warbler	Yes	No	No	No
wood warbler	Yes	No	No	No

As nouns, wood warbler is a hypernym of myrtle warbler; that is, wood warbler is a word with a broader meaning than myrtle warbler:

myrtle warbler: similar to Audubon's warbler
wood warbler: small bright-colored American songbird with a weak unmusical song

Other hypernyms of myrtle warbler include New World warbler.

myrtle warbler (noun)	wood warbler (noun)
similar to Audubon's warbler	small bright-colored American songbird with a weak unmusical song
	European woodland warbler with dull yellow plumage