dolt (n.)
- ass
- birdbrain
- block
- blockhead
- blunderer
- bonehead
- boob
- booby
- boor
- botcher
- bumbler
- bungler
- chump
- clod
- clodhopper
- clot
- clown
- dimwit
- dingbat
- donkey
- dope
- dullard
- dumbbell
- dummy
- dunce
- dunderhead
- fathead
- flake
- fool
- fumbler
- gawk
- goon
- idiot
- ignoramus
- imbecile
- jerk
- klutz
- lightweight
- loon
- lout
- lubber
- lunkhead
- moron
- muggins
- nincompoop
- ninny
- nitwit
- numskull
- oaf
- ox
- pinhead
- put
- simpleton
- slouch
- stupid
- twit
- yokel