1) Concubine 2) Demimonde 3) Doxy 4) Odalisque 1) Concubine 2) Doxy 3) Fancy woman 4) French word used in English 5) Kept woman 6) Mistress 7) Odalisque 8) Paramour 
A courtesan was originally a courtier, which means a person who attends the court of a monarch or other powerful person. The modern use of the term for a prostitute, concubine or mistress of a man of rank belies a much more complex heritage. In feudal society, the court was the centre of government as well as the residence of the monarch, and soci...
• (n.) A woman who prostitutes herself for hire; a prostitute; a harlot.
Cour'te·san noun [ French courtisane , from courtisan courtier, Italian cortigiano ; or directly from Italian cortigiana , or Spanish cortesana . See Court .] A woman who prostitutes herself for hire; a prostitute; a harlot. « Lasciviously decked like ...
a prostitute or paramour, esp. one associating with noblemen or men of wealth.