There are a lot of words that can be used in place of "gives a new lease on life." Some possible synonyms might include revitalizes, rejuvenates, renews, refreshes, restores, regenerates, revivifies, or invigorates. Each of these words captures the idea of bringing new life or energy to something that was previously stagnant or dull. Some other options might include "breathes new life into," "rekindles," "awakens," or "infuses with energy." No matter which synonym you choose, the important thing is to convey the sense of transformation and renewal that comes when something is given a fresh start.