growler vs verbaliser

growler and verbaliser both are nouns.

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

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

growler: a speaker whose voice sounds like a growl
verbaliser: 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, talker, utterer, verbalizer.

growler (noun)	verbaliser (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