Fine-tune is often used to describe the process of refining something to improve its quality or performance. There are several synonyms that can be used to convey a similar meaning. Some commonly used synonyms for fine-tune include perfect, refine, adjust, optimize, tweak, polish, hone, calibrate, and improve. Other related words include enhance, upgrade, modify, and tailor. Depending on the context in which the word is used and the specific meaning that is intended, one of these synonyms may be more appropriate than another. Regardless of which word is chosen, the idea behind fine-tune remains the same: to make something better.