Last resource is commonly used to describe a final option or solution after all others have failed. To avoid using this phrase repetitively, you can opt for synonyms such as last resort, final recourse, ultimate option, endgame, fallback option, conclusive alternative, final stage, end of the line, ultimate fallback, last effort, and final step. These synonyms convey a sense of urgency, indicating that there are no other options available and that the chosen course of action is the final attempt to achieve a desired outcome. Whether in personal or professional situations, knowing alternative phrases to last resource can help you communicate your ideas more effectively and avoid redundancy.