Jocular :: "Jocular (a.) Given to jesting; jocose; as, a jocular person..
Jocularly :: Jocularly (adv.) In jest; for sport or mirth; jocosely.
Jocund :: Jocund () Merry; cheerful; gay; airy; lively; sportive.
Jocundity :: Jocundity (n.) The state or quality of being jocund; gayety; sportiveness.