[1] : WordNet (r) 2.0

wishful thinker
     n : a person who escapes into a world of fantasy syn: escapist,
          dreamer
see also:
escapist dreamer 

[2] : Moby Thesaurus II by Grady Ward, 1.0

19 moby thesaurus words for "wishful thinker":
   don quixote, quixote, daydreamer, dreamer, dreamer of dreams,
   enthusiast, escapist, idealist, lotus-eater, prophet, rhapsodist,
   romancer, romantic, romanticist, seer, utopian, utopianist,
   utopianizer, visionary

Thinker >> T Words
Thinker, definition of term: Thinker
thinker_pag1.html

Wishful >> W Words
Wishful, definition of term: Wishful
wishful_pag1.html

Wishful Thinkin >> W Words
Wishful Thinkin, definition of term: Wishful Thinkin
wishful+thinkin_pag1.html