branchial cleft vs gill cleft

branchial cleft and gill cleft both are nouns.

Word	Noun	Adjective	Verb	Adverb
branchial cleft	Yes	No	No	No
gill cleft	Yes	No	No	No

As nouns, branchial cleft and gill cleft are synonyms defined as:

branchial cleft and gill cleft: one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes

Other synonyms of branchial cleft include gill slit.

branchial cleft (noun)	gill cleft (noun)
one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes	one of a series of slit openings in the pharynxes of fishes and aquatic amphibians through which water passes