The term 'Reason to Reschedule' can be solved by two crossword solutions: RAINOUT (7 letters) and RAIN (4 letters). Rainout is a term used to describe a situation in which an outdoor event or activity has been cancelled due to RAIN. RAIN, of course, is precipitation that falls from the sky. Both of these terms are valid reasons to reschedule an event or activity, as they can cause significant disruption.