Abdicator
The Century Dictionary and Cyclopedia
noun.
One who abdicates.
the GNU version of the Collaborative International Dictionary of English
noun.
One who abdicates.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
one who formally relinquishes an office or responsibility
Word Usage
"My dictionary defines quitter as "one that quits", it is also a synonym for abdicator: "one who formally relinquishes an office or responsibility"."
Hypernym
Words that are more generic or abstract
quitter