"Fit bust" refers to clothing that fits the bust area, but there are many other synonyms that can be used to describe it. One option is "well-fitted," which means that the clothing fits snugly and comfortably on the bust without being too tight or too loose. Another option is "form-fitting," which highlights the garment's ability to conform to the shape of the wearer's bust. "Tailored" is also a synonym that can be used to describe clothing that has been specifically cut and shaped to fit the bust area. Lastly, "flattering" is a synonym that emphasizes how the clothing enhances the wearer's shape and complements their bust.