blat vs utter

blat is not an adjective while utter is an adjective.

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

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

Other hypernyms of blat include emit, let loose, let out.

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

blat (verb)	utter (verb)
cry plaintively	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation