Possessor :: Possessor (n.) One who possesses; one who occupies, holds, owns, or controls; one who has actual participation or enjoyment, generally of that which is desirable; a proprietor..
Possessory :: Possessory (a.) Of or pertaining to possession, either as a fact or a right; of the nature of possession; as, a possessory interest; a possessory lord..
Prepossessor :: Prepossessor (n.) One who possesses, or occupies, previously..
Underpossessor :: Underpossessor (n.) One who possesses or holds anything subject to the superior of another.