speak in tongues vs utter

speak in tongues is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
speak in tongues	No	No	Yes	No
utter	No	Yes	Yes	No

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

Other hypernyms of speak in tongues include mouth, speak, talk, verbalise, verbalize.

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

speak in tongues (verb)	utter (verb)
speak unintelligibly in or as if in religious ecstasy	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation