Bottle-blond is a term used to describe a person who colors their hair blonde using hair dye. However, this term can be considered derogatory by some individuals. There are alternative words that can be used to describe such individuals without being offensive. One of the synonyms for bottle-blond is "dyed-blond," which accurately describes the hair color without any negative connotations. Another synonym is "bleached-blond," which refers to the process of lightening the hair using chemicals. In addition to these words, other terms such as "colored-blond" or "artificially blond" can also be used to describe individuals who have colored their hair blonde using hair dye.