The word insuring means protecting or securing something against potential loss or damage. Synonyms for the word insuring include ensuring, safeguarding, guaranteeing, protecting, covering, and assuring. These words all convey a sense of taking measures to prevent harm or loss. Other synonyms for insuring could include underwriting, indemnifying, securing, and providing coverage. Each of these synonyms may have a slightly different connotation, but they all capture the idea of providing some form of protection against harm or loss. Whatever word you choose to use, it is important to understand the nuances of meaning associated with each synonym.