scat vs vocalizing

scat and vocalizing both are nouns.

Word	Noun	Adjective	Verb	Adverb
scat	Yes	No	Yes	No
vocalizing	Yes	No	No	No

As nouns, vocalizing is a hypernym of scat; that is, vocalizing is a word with a broader meaning than scat:

scat: singing jazz; the singer substitutes nonsense syllables for the words of the song and tries to sound like a musical instrument
vocalizing: the act of singing vocal music

Other hypernyms of scat include singing, jazz.

scat (noun)	vocalizing (noun)
singing jazz; the singer substitutes nonsense syllables for the words of the song and tries to sound like a musical instrument	the act of singing vocal music

scat (verb)	vocalizing (verb)
flee; take to one's heels; cut and run