modulate vs utter

modulate is not an adjective while utter is an adjective.

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

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

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

modulate (adjective)	utter (adjective)
	complete and absolute
	without qualification; used informally as (often pejorative) intensifiers

modulate (verb)	utter (verb)
adjust the pitch, tone, or volume of	express in speech
fix or adjust the time, amount, degree, or rate of	articulate; either verbally or with a cry, shout, or noise
vary the frequency, amplitude, phase, or other characteristic of (electromagnetic waves)	express audibly; utter sounds (not necessarily words)
vary the pitch of one's speech	put into circulation
change the key of, in music