High and sigh...
word
fret
Char.
gnat
The 4 letter -ool rhymes are fool, pool, and tool. Depending on the dialect, other 4-letter rhymes can be duel and rule.
flit
The word is live. (long i sound, rhymes with hive)
hoot
char, star
Envy Is A 4-Letter Word
Salt is a 4 letter word for seasoning.
4 letter word for final