Paramour

n.	1.	A lover, of either sex; a wooer or a mistress (formerly in a good sense, now only in a bad one); one who takes the place, without possessing the rights, of a husband or wife; - used of a man or a woman. The seducer appeared with dauntless front, accompanied by his paramour - Macaulay.
	2.	Love; gallantry.
adv.	1.	By or with love, esp. the love of the sexes; - sometimes written as two words. For par amour, I loved her first ere thou. - Chaucer.

Noun	1.	paramour - a woman's lover Synonyms: fancy man
	2.	paramour - a woman who cohabits with an important man Synonyms: concubine, courtesan, doxy, odalisque

Casanova, admirer, adorer, amorist, concubine, doxy, follower, infatuate, kept mistress, kept woman, lover, mistress, playmate, pursuer, suitor, unofficial wife, woman, wooer