Search Result for "guesser": 
Wordnet 3.0

NOUN (1)

1. a person who guesses; 



The Collaborative International Dictionary of English v.0.48:

Guesser \Guess"er\, n.
   One who guesses; one who forms or gives an opinion without
   means of knowing.
   [1913 Webster]


WordNet (r) 3.0 (2006):

guesser
    n 1: a person who guesses