brood hen vs broody hen

brood hen and broody hen both are nouns.

Word	Noun	Adjective	Verb	Adverb
brood hen	Yes	No	No	No
broody hen	Yes	No	No	No

As nouns, brood hen and broody hen are synonyms defined as:

Other synonyms of brood hen include broody, setting hen, sitter.

brood hen (noun)	broody hen (noun)
a domestic hen ready to brood	a domestic hen ready to brood