Living as man and wife is a common phrase used to describe a romantic relationship where two people live together and share household responsibilities, finances, and intimate moments. However, there are many synonyms for this phrase that can be used to describe the same relationship. Some of these synonyms include cohabiting, shacking up, domestic partnership, common-law marriage, and living together. These phrases are often used to describe situations where couples are not legally married but still live together as if they were. Regardless of the term used, the sentiment remains the same: living as man and wife represents a committed and loving relationship.