supplanter

from WordNet (r) 3.0 (2006)
supplanter
    n 1: one who wrongfully or illegally seizes and holds the place
         of another [syn: {usurper}, {supplanter}]
from The Collaborative International Dictionary of English v.0.48
Supplanter \Sup*plan"ter\ (s[u^]p*pl[a^]nt"[~e]r), n.
   One who supplants.
   [1913 Webster]
antiflux / dictionary / supplanter
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