ON THE OFF-CHANCE
ON PURPOSE
ON CONDITION THAT
ON DUTY
ON A BUDGET
ON SECOND THOUGHTS
ON ONE'S OWN
ON TARGET
ON A WHIM
ON PRINCIPLE
WORKING
JUST IN CASE
AFTER RE-CONSIDERATION
DUE TO A BELIEF
ONLY IF
WITH A LIMITED AMOUNT OF MONEY
INDEPENDENTLY
AS PLANNED
INTENTIONALLY
IMPULSIVELY
