liberator

from WordNet (r) 3.0 (2006)
liberator
    n 1: someone who releases people from captivity or bondage [ant:
         {captor}, {capturer}]
from The Collaborative International Dictionary of English v.0.48
Liberator \Lib"er*a`tor\ (l[i^]b"[~e]r*[=a]`t[~e]r), n. [L.]
   One who, or that which, liberates; a deliverer.
   [1913 Webster]
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