The word "re-lights" means to light something again or to ignite something that has been extinguished. If you need to express the same meaning with different words, you can use several synonyms such as reignites, relumes, rekindles, recharges, rejuvenates, restarts, resumes, revitalizes, reactivates, refreshes, revives, and reinstates. Each of these words has slightly different connotations, so you should choose the appropriate synonym based on the context of your sentence. For instance, "rejuvenates" may be more appropriate to describe the renewal of vitality in a person, while "restarts" may be more appropriate to describe the renewal of an operation or process.