geisha girl vs geisha

geisha girl and geisha both are nouns.

Word	Noun	Adjective	Verb	Adverb
geisha girl	Yes	No	No	No
geisha	Yes	No	No	No

As nouns, geisha girl and geisha are synonyms defined as:

geisha girl and geisha: a Japanese woman trained to entertain men with conversation and singing and dancing

geisha girl (noun)	geisha (noun)
a Japanese woman trained to entertain men with conversation and singing and dancing	a Japanese woman trained to entertain men with conversation and singing and dancing