growling vs utterance

growling and utterance both are nouns.

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

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

growling: a gruff or angry utterance (suggestive of the growling of an animal)
utterance: the use of uttered sounds for auditory communication

Other hypernyms of growling include vocalization.

growling (noun)	utterance (noun)
a gruff or angry utterance (suggestive of the growling of an animal)	the use of uttered sounds for auditory communication
the sound of growling (as made by animals)