The term 'CHECK AGAIN' can be broken down into four separate crossword solutions: ENSURE (6 letters), RETEST (6 letters), REREAD (6 letters), and RESURVEY (8 letters). Each of these words implies a different action that can be taken to double-check something. ENSURE means to make certain or guarantee, RETEST means to test again, REREAD means to read again, and RESURVEY means to survey again. Together, these words suggest that it is important to take the time to double-check something in order to make sure it is accurate.