Below are possible answers for the crossword clue Happen (upon).
6 letter answer(s) to happen (upon)
ALIGHT
come down; "the birds alighted"
lighted up by or as by fire or flame; "forests set ablaze (or afire) by lightning"; "even the car's tires were aflame"; "a night aflare with fireworks"; "candles alight on the tables"; "houses on fire"
to come to rest, settle; "Misfortune lighted upon him"
Other crossword clues with similar answers to 'Happen (upon)'