rant vs utter

rant is a noun but utter is not a noun.

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

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

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

rant (noun)	utter (noun)
pompous or pretentious talk or writing
a loud bombastic declamation expressed with strong emotion

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

rant (verb)	utter (verb)
talk in a noisy, excited, or declamatory manner	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation