vocalizer vs organism

vocalizer and organism both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocalizer	Yes	No	No	No
organism	Yes	No	No	No

As nouns, organism is a hypernym of vocalizer; that is, organism is a word with a broader meaning than vocalizer:

vocalizer: an organism that can utter vocal sounds
organism: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of vocalizer include being.

vocalizer (noun)	organism (noun)
a person who sings	a living thing that has (or can develop) the ability to act or function independently
an organism that can utter vocal sounds	a system considered analogous in structure or function to a living body