justified - Having a valid reason or explanation for an action, belief, or decision.
joyous - Full of happiness and delight; very joyful; bringing or causing great happiness.
jeopardize - To endanger or threaten the success or safety of something.
jolly - Cheerful, happy, and full of good humor.
jubilant - Feeling or expressing great joy, happiness, or triumph.
irresistible - Too attractive, appealing, or tempting to be refused or ignored.
keen - Having a sharp or highly developed sense; or eager or enthusiastic about something.
jitters - Temporary nervous tension that affects a person’s ability to stay calm.
jackpot - A large cash prize, typically won in a game of chance or lottery.
juicy - Highly interesting, exciting, or sensational, especially regarding gossip or news.
jarring - Causing a sudden, unpleasant, or shocking effect.
jumbo - Extra or oversized in comparison to the standard.