modulate vs verbalize

modulate and verbalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
modulate	No	No	Yes	No
verbalize	No	No	Yes	No

As verbs, verbalize is a hypernym of modulate; that is, verbalize is a word with a broader meaning than modulate:

Other hypernyms of modulate include mouth, speak, talk, utter, verbalise.

modulate (verb)	verbalize (verb)
adjust the pitch, tone, or volume of	convert into a verb
fix or adjust the time, amount, degree, or rate of	express in speech
vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)	be verbose
vary the pitch of one's speech	articulate; either verbally or with a cry, shout, or noise
change the key of, in music