The phrase "take for better or worse" essentially means to accept something or someone despite any negative aspects or consequences. There are several synonyms that can be used to convey the same meaning, such as "embrace unconditionally," "accept unreservedly," "tolerate without reservation," or "endorse without reservation." Other alternatives include "acknowledge without reservation," "admit without reservation," "support without reservation," or "back without reservation." These synonyms are useful when someone wants to express their willingness to accept a situation or person despite any potential difficulties or problems. By using such phrases, one can convey their commitment to stand by someone or something despite all odds.