The phrase "other half" refers to a person's significant other or spouse. There are various synonyms for this term, each with their unique connotations and nuances. One of the most common synonyms is "better half," which suggests that the person complements or enhances the other's qualities. Another alternative is "soul mate," which speaks to a deep emotional connection between two people. "Partner" or "companion" are more neutral terms that focus on the bond rather than the romantic aspect. Other synonyms include "spouse," "mate," "beloved," and "significant other." Each of these words can be used to describe the person with whom an individual shares their life and experiences.