When you have exhausted all other options, a "last resort" may be necessary. However, there are also other synonyms you can use to convey the same meaning. Some of these include "final option," "extreme measure," "endgame," "ultimatum," "desperation move," "final recourse," "Hail Mary pass," and "final attempt." Each of these phrases suggests a sense of urgency and importance, indicating that there are no other options left. Choosing the right synonym for "last resort" can help convey a sense of seriousness and urgency, and can be useful for both creative writing and professional communication.