The phrase "gave off" is commonly used to describe when something releases or emits a certain scent, energy, or substance. There are several synonyms that can be used in its place, depending on the context in which it is being used. These include words such as emitted, discharged, exuded, emanated, produced, generated, released, and radiated. For example, "The flowers emitted a sweet aroma," or "The car engine radiated heat." By choosing synonyms that better suit the tone and message you're trying to convey, you could potentially enhance the clarity and effectiveness of your writing.