Blockish, at a loss for words, aphasic, as thick as two short planks, and birdbrained are all synonyms for dumb. Smart and intelligent are these antonyms of dumb. And here are another 75 synonyms for dumb.
Dumb Synonyms
1. speechless
- At a loss for words
- Close-mouthed
- Inarticulate
- Saying nothing
- Silent
- Speechless
- Taciturn
- Tight-lipped
- Tongue-tied
- Uncommunicative
- Untalkative
- Voiceless
- Wordless
- Mum
2. mute
- Aphasic
- Aphonic
- Mute
- Unable to speak
- Without the power of speech
- Dumb
3. stupid
- As thick as two short planks
- Birdbrained
- Blockish
- Boneheaded
- Bovine
- Brain-dead
- Brainless
- Chuckleheaded
- Cretinous
- Daft
- Dead from the neck up
- Dense
- Dim
- Dippy
- Dof
- Doltish
- Dopey
- Dozy
- Dull-witted
- Dull
- Dunce-like
- Dunderheaded
- Empty-headed
- Fat-headed
- Foolish
- Half-baked
- Half-witted
- Idiotic
- Ignorant
- Imbecilic
- Lamebrained
- Lumpish
- Mindless
- Moronic
- Muttonheaded
- Not the full shilling
- Obtuse
- Pea-brained
- Simple-minded
- Simple
- Slow on the uptake
- Slow-witted
- Slow
- Soft in the head
- Stupid
- Thick-skulled
- Thick
- Thickheaded
- Unintelligent
- Vacuous
- Vapid
- Witless
- Wooden-headed
- Dotish