rondo vs rondeau

rondo and rondeau both are nouns.

Word	Noun	Adjective	Verb	Adverb
rondo	Yes	No	No	No
rondeau	Yes	No	No	No

As nouns, rondo and rondeau are synonyms defined as:

rondo and rondeau: a musical form that is often the last movement of a sonata

rondo (noun)	rondeau (noun)
a musical form that is often the last movement of a sonata	a French verse form of 10 or 13 lines running on two rhymes; the opening phrase is repeated as the refrain of the second and third stanzas
	a musical form that is often the last movement of a sonata