Synonyms for Dull

Synonyms starting with letter I

• irksome

  excite
• inactive

  property, dead, sluggish
• insipid

  flat, uninteresting, boring
• indistinct

  drab, muffled, muted
• inert

  property, dead, sluggish
• insensible

  attitude, awareness, lifeless
• indifferent

  lackadaisical, languid, lifeless
• indolent

  listless, unintelligent
• insensitive

  attitude, awareness, lifeless
• imbecilic

  unintelligent
• impassive

  inexpressive
• ignorant

  slow, unintelligent, undiscerning
• idiotic

  unintelligent
• idle

  quiet
• inanimate

  behaviour, property
• insensate

  attitude, unintelligent
• imbecile

  foolish
• inane

  asinine
• impair

  numb
• inept

  irrational
• indeterminate
• interminable

  continual
• inapt

  boring
• impenetrable
• impassible

  insensitive
• indefinite
• imperceptive
• inoperative

  inert
• inhibit

  obstruct
• immobilize
• inferior
• institutional
• ill-defined
• insentient
• irrational
• insane
• incessant

  repeated
• inoffensive
• impersonal
• incapacitate