the GNU version of the Collaborative International Dictionary of English
n. One who abuses [in the various senses of the verb].
The Century Dictionary and Cyclopedia
n. One who abuses, in speech or behavior; one who deceives.
n. A ravisher.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who abuses
Word Usage
"When I use the word abuser I'm talking about batterers, both physical and psychological, sexual predators and those who kill the flower of youth with the effluent of inappropriate desire."