jade
jade jewel
Jade
Jealousy is an emotion. It begins with the letter J.
Jasmiine
jumanji
juice
That would be a juniper tree.
Some 5-letter words beginning with 'j' are:jabotjauntjazzyjeansjellyjennyjettyjeweljiffyjimmyjointjoistjokerjollyjoulejoustjowlyjudgejuicejuicyjulepjumbojumpyjunkyjuror
jersey
The Jetsons
javelin