The term 'on one's toes' is an idiom that means to be ALERT and attentive. This phrase can be used to describe someone who is ready to respond quickly to any situation. The crossword solutions for this term are ALERT (5 letters), ALERTED (7 letters), AWARE (5 letters), AWAKE (5 letters), and ATIP (4 letters). All of these words are related to being ALERT and attentive, and they all have the same meaning as the phrase 'on one's toes'.