The phrase "keep alive" can be paraphrased in many different ways depending on the context. Synonyms for keeping something or someone alive can include nurturing, sustaining, preserving, maintaining, upholding, continuing, and extending. Other possible synonym options could include supporting, promoting, paying attention to, preserving, and protecting. The word choice will depend on factors such as the object being kept alive and the tone of the situation. In any case, remembering different synonyms for "keep alive" can help a writer or speaker convey their messages more effectively and creatively.