Synonyms for Preposterous

Synonyms starting with letter S

• silly

  ridiculous, absurd, foolish
• 

  stupid

  absurd, ridiculous
• senseless

  ridiculous, absurd
• shocking

  ridiculous, usual, outrageous
• sappy

  ability
• softheaded

  ability
• specious

  illogical
• sky-high
• strange
• screwy
• scandalous
• screwball
• steep
• self-contradictory
• short-sighted
• simpleminded
• shameful
• spurious
• sophistic
• strained
• singular
• simple
• suspect
• slapstick
• slow-witted
• slaying
• side-splitting
• splitting
• showy
• spendthrift
• stiff
• shadowy
• suppositious
• self-willed
• severe
• sheer
• stern
• strict
• sophistical
• stilted