letdown (n.)

• abasement
• abatement
• alleviation
• arrest
• assuagement
• bafflement
• balk
• blow
• buffet
• calming
• check
• comedown
• dash
• deadening
• debasement
• deceleration
• defeat
• deflation
• delay
• descent
• detention
• diminution
• disappointment
• discomfiture
• disgrace
• disillusionment
• dissatisfaction
• drag
• dump
• easing
• embarrassment
• failure
• fiasco
• fizzle
• flagging
• foiling
• frustration
• holdup
• humiliation
• hushing
• lag
• leniency
• lessening
• letup
• lightening
• loosening
• mirage
• mitigation
• modulation
• mollification
• mortification
• obstruction
• pacification
• palliation
• put-down
• reduction
• relaxation
• remission
• retardation
• self-abasement
• self-abnegation
• setback
• shame
• shamefacedness
• slackening
• slowdown
• slowing
• softening
• tantalization
• tease
• tempering