Prevenance :: Prevenance (n.) A going before; anticipation in sequence or order.
Prevenancy :: Prevenancy (n.) The act of anticipating another's wishes, desires, etc., in the way of favor or courtesy; hence, civility; obligingness..
Prevene :: Prevene (v. t. & i.) To come before; to anticipate; hence, to hinder; to prevent..
Prevenience :: Prevenience (n.) The act of going before; anticipation.
Preventive :: Preventive (a.) Tending to defeat or hinder; obviating; preventing the access of; as, a medicine preventive of disease..
Preventive :: Preventive (n.) That which prevents, hinders, or obstructs; that which intercepts access; in medicine, something to prevent disease; a prophylactic..