Finding synonyms for the phrase "gave new lease on life" can be challenging, but there are several options available. Some good options would be "provided a fresh start," "revitalized," "renewed," and "reinvigorated." Another great alternative would be "breathed new life into," or "reanimated." These phrases are suitable for situations where someone or something has been given a second chance or new beginning. Additionally, you could use "ignited," "awakened," or "stimulated" as synonyms to describe the same situation. Ultimately, the choice of the synonym will depend on the tone and context of the text or situation.