Princeton's WordNet

1. pretension, pretense, pretence(noun)

   a false or unsupportable quality

   Synonyms:
   largeness, pretending, pretence, pretext, simulation, pretense, pretension, feigning, pretentiousness, make-believe, guise, dissembling

2. guise, pretense, pretence, pretext(noun)

   an artful or simulated semblance

   Synonyms:
   pretending, pretence, pretext, simulation, pretense, pretension, feigning, guise, make-believe, stalking-horse, dissembling

3. pretense, pretence, feigning, dissembling(noun)

   pretending with intention to deceive

   Synonyms:
   dissimulation, pretending, deceit, pretence, pretext, pretension, pretense, guise, feigning, make-believe, simulation, deception, dissembling

4. pretense, pretence, make-believe(noun)

   imaginative intellectual play

   Synonyms:
   pretend, pretending, pretence, pretext, pretension, pretense, guise, feigning, make-believe, simulation, dissembling

5. pretense, pretence, pretending, simulation, feigning(noun)

   the act of giving a false appearance

   Synonyms:
   pretending, pretence, pretext, pretension, pretense, guise, feigning, computer simulation, make-believe, simulation, model, dissembling