Blockhead, ass, and birdbrain are all synonyms for jackass. Genius and smart person are these antonyms of jackass. And here are another 31 synonyms for jackass.
Jackass Synonyms
- Ass
- Birdbrain
- Blockhead
- Bonehead
- Buffoon
- Clod
- Clown
- Cretin
- Dimwit
- Dodo
- Dolt
- Donkey
- Dunce
- Dunderhead
- Fool
- Goon
- Halfwit
- Idiot
- Ignoramus
- Imbecile
- Lamebrain
- Moron
- Mule
- Nincompoop
- Ninny
- Nitwit
- Numbskull
- Scatterbrain
- Simpleton
- Prat