That’s not a letter, that’s a string of letters.
But anyways…
Ass
Bitch
Cock
Dick
eejit ( https://www.urbandictionary.com/define.php?term=eejit )
F**k
Go***mn
Hell
Closest I could find was “inbred”
Jackass
Kike
“Lick a dick,”
Motherf**ker
You are not getting me to say that
Piss
Shit
Twat
Wanker
zatch