bumble vs utter

bumble is not an adjective while utter is an adjective.

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

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

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

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

bumble (verb)	utter (verb)
speak haltingly	express in speech
walk unsteadily, tripping repeatedly	articulate; either verbally or with a cry, shout, or noise
make a mess of, destroy or ruin	express audibly; utter sounds (not necessarily words)
	put into circulation