There are several synonyms for the word "wife-to-be" that can be used depending on the context and tone of the sentence. Some common words used to describe a woman who is engaged to be married include fiance, betrothed, and bride-to-be. Fiance is typically used to describe a man who is engaged, while betrothed refers to a more formal engagement or vow of marriage. Bride-to-be is a commonly used term that highlights the forthcoming wedding day and all the preparations that come with it. Additionally, some couples may prefer more informal terms like future wife, soon-to-be spouse, or even life partner. Regardless of the synonym used, the most important factor is the love and commitment between the two people getting married.