mussitate vs utter

mussitate is not an adjective while utter is an adjective.

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

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

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

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

mussitate (verb)	utter (verb)
talk indistinctly; usually in a low voice	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation