clamor vs utter

clamor is a noun but utter is not a noun.

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

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

Other hypernyms of clamor include express, give tongue to, verbalise, verbalize.

clamor (noun)	utter (noun)
loud and persistent outcry from many people
a loud harsh or strident noise

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

clamor (verb)	utter (verb)
utter or proclaim insistently and noisily	express in speech
make loud demands	articulate; either verbally or with a cry, shout, or noise
compel someone to do something by insistent clamoring	express audibly; utter sounds (not necessarily words)
	put into circulation