thrush vs vocalizer

thrush and vocalizer both are nouns.

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

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

Other hypernyms of thrush include singer, vocaliser, vocalist.

thrush (noun)	vocalizer (noun)
songbirds characteristically having brownish upper plumage with a spotted breast	a person who sings
a woman who sings popular songs	an organism that can utter vocal sounds
candidiasis of the oral cavity; seen mostly in infants or debilitated adults