caroler vs singer

caroler and singer both are nouns.

Word	Noun	Adjective	Verb	Adverb
caroler	Yes	No	No	No
singer	Yes	No	No	No

As nouns, singer is a hypernym of caroler; that is, singer is a word with a broader meaning than caroler:

Other hypernyms of caroler include vocaliser, vocalist, vocalizer.

caroler (noun)	singer (noun)
a singer of carols	a person who sings