prater vs utterer

prater and utterer both are nouns.

Word	Noun	Adjective	Verb	Adverb
prater	Yes	No	No	No
utterer	Yes	No	No	No

As nouns, utterer is a hypernym of prater; that is, utterer is a word with a broader meaning than prater:

prater: an obnoxious and foolish and loquacious talker
utterer: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of prater include speaker, talker, verbaliser, verbalizer.

prater (noun)	utterer (noun)
an obnoxious and foolish and loquacious talker	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
	someone who circulates forged banknotes or counterfeit coins
	an organism that can utter vocal sounds