Outliver means to survive or live longer than someone or something. There are several synonyms for this word including outlast, persevere, endure, survive, and surpass. Outlast refers to enduring or continuing beyond a specified period or deadline. Persevere means to persist in pursuit of a goal despite challenges or obstacles. Endure denotes the ability to withstand hardship, pain or stress. Survive means to remain alive, especially after a near-death experience. Finally, surpass means to go beyond something or someone in achievement or performance. All these words are powerful synonyms of outliver and can be used interchangeably depending on the context of the sentence.