The phrase "time to kill" suggests having an abundance of free time and no responsibilities or tasks to attend to. Antonyms for "time to kill" would be phrases that suggest the opposite, such as "overworked," "busy," "time-crunched," "stressed," or "overburdened." These phrases convey the sense of having too much to do and not enough time to do it. Other possible antonyms might include "urgency," "immediacy," or "deadline." These words all imply a need for speed and efficiency, as opposed to leisure and relaxation. When seeking the opposite of "time to kill," look for phrases that convey a sense of urgency, obligation, and busyness.