prate vs smatter

prate is a noun but smatter is not a noun.

Word	Noun	Adjective	Verb	Adverb
prate	Yes	No	Yes	No
smatter	No	No	Yes	No

As verbs, smatter is a hyponym of prate; that is, smatter is a word with a more specific, narrower meaning than prate:

Other hyponyms of prate include babble, blather, blether, blither.

prate (noun)	smatter (noun)
idle or foolish and irrelevant talk

prate (verb)	smatter (verb)
speak (about unimportant matters) rapidly and incessantly	speak with spotty or superficial knowledge
	to talk foolishly
	work with in an amateurish manner