jacket
jackpot
jackrabbit
jabot
jet
jest
jolliest
joint
jot
joust
journalist
jut
jubilant
jumpiest
jurist
just
A four letter word that starts with J and ends with M: jism.
A four letter word that starts with g and ends with n is gown :)
TintTaintTootThoughtTauntTautTraitTreat
Vita
Item.
adze
Rota
Arab
SUSSEX
Jeer
turd.
zest