wailer vs talker

wailer and talker both are nouns.

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

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

wailer: a mourner who utters long loud high-pitched cries
talker: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of wailer include griever, lamenter, mourner, sorrower, speaker, utterer, verbaliser, verbalizer.

wailer (noun)	talker (noun)
a mourner who utters long loud high-pitched cries	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)