pronunciation vs utterance

pronunciation and utterance both are nouns.

Word	Noun	Adjective	Verb	Adverb
pronunciation	Yes	No	No	No
utterance	Yes	No	No	No

As nouns, utterance is a hypernym of pronunciation; that is, utterance is a word with a broader meaning than pronunciation:

Other hypernyms of pronunciation include vocalization.

pronunciation (noun)	utterance (noun)
the manner in which someone utters a word	the use of uttered sounds for auditory communication
the way a word or a language is customarily spoken