[1] : WordNet (r) 2.0

mental block
     n : an inability to remember or think of something you normally
         can do; often caused by emotional tension; "i knew his
         name perfectly well but i had a temporary block" syn: block
see also:
block 

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

21 moby thesaurus words for "mental block":
   agnosia, block, blocking, conversion, defense mechanism, delirium,
   delusion, delusion of persecution, disorientation, flight of ideas,
   hallucination, hallucinosis, mental confusion, nihilism,
   nihilistic delusion, paralogia, psychological block, repression,
   sublimation, suppression, symbolization

Block >> B Words
Block, definition of term: Block
block_pag1.html

Block Out >> B Words
Block Out, definition of term: Block Out
block+out_pag1.html

Block Letter >> B Words
Block Letter, definition of term: Block Letter
block+letter_pag1.html

Block Grant >> B Words
Block Grant, definition of term: Block Grant
block+grant_pag1.html

Building Block >> B Words
Building Block, definition of term: Building Block
building+block_pag1.html

Cinder Block >> C Words
Cinder Block, definition of term: Cinder Block
cinder+block_pag1.html

Block And Tackl >> B Words
Block And Tackl, definition of term: Block And Tackl
block+and+tackl_pag1.html