Synonyms of the word

disappointment

• n. (uncountable) The emotion felt when a strongly held expectation is not met.
• n. (countable) A circumstance in which a strongly held expectation is not met.

dissatisfaction

• n. unhappiness or discontent.
• n. the cause of such feelings.

failure

• n. State or condition of not meeting a desirable or intended objective, opposite of success.
• n. An object, person or endeavour in a state of failure or incapable of success.
• n. Termination of the ability of an item to perform its required function, breakdown.

letdown

• n. Alternative form of let-down.