Plural: lechers

ETYM Old Eng. lechur, lechour, Old Fren. lecheor, lecheur, gormand, glutton, libertine, parasite, from lechier to lick, French lécher; of Teutonic origin. Related to Lick.
A man given to lewdness; one addicted, in an excessive degree, to the indulgence of sexual desire, or to illicit commerce with women.

Given to excessive indulgence in sexual activity

In a lecherous manner, lewdly, lasciviously

Plural: lecherousnesses

A strong sexual desire; SYN. lust, lustfulness.

Plural: lecheries

ETYM Old Eng. lecherie, Old Fren. lecherie. Related to Lecher.
Unrestrained indulgence in sexual activity.