Search Result for "meliorist": 
Wordnet 3.0

NOUN (1)

1. a disputant who advocates reform;
[syn: reformer, reformist, crusader, social reformer, meliorist]



WordNet (r) 3.0 (2006):

meliorist
    n 1: a disputant who advocates reform [syn: reformer,
         reformist, crusader, social reformer, meliorist]