roulade vs tune

roulade and tune both are nouns.

Word	Noun	Adjective	Verb	Adverb
roulade	Yes	No	No	No
tune	Yes	No	Yes	No

As nouns, tune is a hypernym of roulade; that is, tune is a word with a broader meaning than roulade:

Other hypernyms of roulade include air, line, melodic line, melodic phrase, melody, strain.

roulade (noun)	tune (noun)
(music) an elaborate run of several notes sung to one syllable	the adjustment of a radio receiver or other circuit to a required frequency
a dish consisting of a slice of meat that is rolled around a filling and cooked	the property of producing accurately a note of a given pitch
	a succession of notes forming a distinctive sequence

roulade (verb)	tune (verb)
	adjust the pitches of (musical instruments)
	adjust for (better) functioning