lisper vs talker

lisper and talker both are nouns.

Word	Noun	Adjective	Verb	Adverb
lisper	Yes	No	No	No
talker	Yes	No	No	No

As nouns, talker is a hypernym of lisper; that is, talker is a word with a broader meaning than lisper:

lisper: a speaker who lisps
talker: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of lisper include speaker, utterer, verbaliser, verbalizer.

lisper (noun)	talker (noun)
a speaker who lisps	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)