the letter -L-
It depends on what you mean by 'four letter word'. Thea has four letters, so yes it is. It is not a swear word, so it's not that kind of 'four letter word'.
A kind of fungus.
Hare
Type.
kiss kick kind knit
kind, eked, oaks, tank
kill, kind, kiss, Kris
nova
Lox
Kind, kill, keep, kink, kook
kind, king, kohl, kilt, kids,