Heed the alarm is a phrase that is used to emphasize the importance of responding quickly and taking action when an alarm is sounded. The crossword solutions for this phrase are ARSE (4 letters), WAKEN (5 letters), RISE (4 letters), ARISE (5 letters), and AWAKEN (6 letters). These words all have similar meanings, with ARSE, RISE, and ARISE meaning to get up from a lying or sitting position, and WAKEN and AWAKEN meaning to wake up from sleep. All of these words can be used to describe the action of responding to an alarm.