broody hen vs setting hen

broody hen and setting hen both are nouns.

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

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

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

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