Some three letter words ending in AT are:
shoat, stoat, sprat, sweat
a three letter word is bug. Three letter words ending with the letter g are bug and hug.
The three-letter word for scull is "oar."
A three-letter word ending in "ux" is "lux," which means a unit of illumination or light.
who
boa
eta
too
you, emu, gnu
suq
tar
fra
Isy, osy