vociferator vs speaker

vociferator and speaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
vociferator	Yes	No	No	No
speaker	Yes	No	No	No

As nouns, speaker is a hypernym of vociferator; that is, speaker is a word with a broader meaning than vociferator:

vociferator: a loud and vehement speaker (usually in protest)
speaker: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of vociferator include talker, utterer, verbaliser, verbalizer.

vociferator (noun)	speaker (noun)
a loud and vehement speaker (usually in protest)	electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)