kept woman vs fancy woman

kept woman and fancy woman both are nouns.

Word	Noun	Adjective	Verb	Adverb
kept woman	Yes	No	No	No
fancy woman	Yes	No	No	No

As nouns, kept woman and fancy woman are synonyms defined as:

kept woman and fancy woman: an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man

Other synonyms of kept woman include mistress.

kept woman (noun)	fancy woman (noun)
an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man	an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man
	a woman who engages in sexual intercourse for money