jab
jack
jade
joccund
joules
Jerk
Jaw
jonquil
Jovial jewel
Jaunt.
Jovial
Joy, Joyfully
Java
There are no words in the English language that begin and end with the letter j.
Some 5-letter words beginning with 'j' are:jabotjauntjazzyjeansjellyjennyjettyjeweljiffyjimmyjointjoistjokerjollyjoulejoustjowlyjudgejuicejuicyjulepjumbojumpyjunkyjuror