· jack
ummm...there's the jugular vein...
Jealousy is an emotion. It begins with the letter J.
jumanji
Jasmiine
juice
That would be a juniper tree.
Some 5-letter words beginning with 'j' are:jabotjauntjazzyjeansjellyjennyjettyjeweljiffyjimmyjointjoistjokerjollyjoulejoustjowlyjudgejuicejuicyjulepjumbojumpyjunkyjuror
Your jaw starts with the letter J.
jersey
JAG
javelin
· Jug