There are several synonyms for the term "unmarried woman"; some of the most common include single, unwed, spinster, and bachelorette. "Single" is a general term that refers to someone who is not in a committed relationship, whereas "unwed" specifically refers to someone who has never been married. "Spinster" is a term that has fallen out of use in recent years but was historically used to refer to an older unmarried woman. "Bachelorette" is a more modern term often used in the context of dating shows to refer to a single woman looking for love. Regardless of the term used, it is important to remember that an unmarried woman is not defined solely by her relationship status.