screwball (n.)
- alien
- beany
- bedlamite
- bowl
- buggy
- case
- cast
- change-up
- character
- chuck
- chunk
- crackpot
- crank
- cuckoo
- curve
- dement
- demoniac
- deviant
- eccentric
- fanatic
- fastball
- fey
- flake
- fling
- flip
- freak
- funny
- goofy
- haywire
- heave
- hermit
- hobo
- hurl
- idiot
- irregular
- knuckleball
- kook
- lateral
- lob
- loner
- loon
- loony
- lunatic
- madman
- maniac
- maverick
- natural
- nonconformist
- nut
- nuts
- odd
- oddball
- oddity
- original
- outsider
- pariah
- pass
- peg
- pitch
- potty
- put
- queer
- recluse
- serve
- service
- shy
- singular
- sinker
- slider
- sling
- solitary
- spitball
- spitter
- throw
- toss
- tramp
- type
- weirdo
- zealot
screwball (adj.)
- abnormal
- alien
- anomalous
- balmy
- barmy
- bats
- batty
- bonkers
- buggy
- case
- cast
- crackers
- crank
- cranky
- crotchety
- demoniac
- deviant
- different
- divergent
- dotty
- eccentric
- erratic
- exceptional
- fanatic
- fey
- flaky
- fling
- flip
- freakish
- fruity
- funny
- gaga
- goofy
- haywire
- idiosyncratic
- irregular
- kinky
- kooky
- lateral
- loony
- loopy
- lunatic
- maggoty
- maniac
- maverick
- natural
- nonconformist
- nut
- nuts
- nutty
- odd
- original
- pass
- peculiar
- peg
- phrenetic
- potty
- put
- queer
- quirky
- recluse
- screwy
- serve
- service
- shy
- singular
- slaphappy
- solitary
- strange
- twisted
- unconventional
- unnatural
- wacky
- whimsical
