frustration (n.)

• ambivalence
• annulment
• bafflement
• balk
• blow
• buffet
• cancellation
• check
• checkmate
• circumvention
• comedown
• conflict
• confusion
• dash
• defeat
• disappointment
• discomfiture
• disconcertion
• disillusionment
• dissatisfaction
• elusion
• evasion
• failure
• fiasco
• fizzle
• foil
• foiling
• invalidation
• letdown
• mirage
• neutralization
• nullification
• rebuff
• repulse
• reversal
• reverse
• rout
• setback
• stress
• tantalization
• tease
• thwarting
• trauma
• undoing
• upset
• vitiation
• voiding