ejaculator vs utterer

ejaculator and utterer both are nouns.

Word	Noun	Adjective	Verb	Adverb
ejaculator	Yes	No	No	No
utterer	Yes	No	No	No

As nouns, utterer is a hypernym of ejaculator; that is, utterer is a word with a broader meaning than ejaculator:

ejaculator: a speaker who utters a sudden exclamation
utterer: someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

Other hypernyms of ejaculator include speaker, talker, verbaliser, verbalizer.

ejaculator (noun)	utterer (noun)
a speaker who utters a sudden exclamation	someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
a man who ejaculates semen	someone who circulates forged banknotes or counterfeit coins
	an organism that can utter vocal sounds