warble vs warbler

warble and warbler both are nouns.

Word	Noun	Adjective	Verb	Adverb
warble	Yes	No	Yes	No
warbler	Yes	No	No	No

warble (noun)	warbler (noun)
a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly	a small active songbird
	a singer; usually a singer who adds embellishments to the song

warble (verb)	warbler (verb)
sing or play with trills, alternating with the half note above or below
sing by changing register; sing by yodeling