warble vs descant

warble and descant both are nouns.

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

As verbs, warble and descant are synonyms defined as:

Other synonyms of warble include yodel.

warble (noun)	descant (noun)
a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly	a decorative musical accompaniment (often improvised) added above a basic melody

warble (verb)	descant (verb)
sing or play with trills, alternating with the half note above or below	sing by changing register; sing by yodeling
sing by changing register; sing by yodeling	talk at great length about something of one's interest
	sing in descant