growler vs talker

growler and talker both are nouns.

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

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

growler: a speaker whose voice sounds like a growl
talker: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

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

growler (noun)	talker (noun)
a small iceberg or ice floe just large enough to be hazardous for shipping	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
a speaker whose voice sounds like a growl