There are several synonyms for the phrase "breach promise." These include breaking a commitment, failing to fulfill an agreement, violating a pledge, and reneging on a vow. Other synonyms include noncompliance, deception, unfaithfulness, and dishonesty. In legal terms, a breach of promise is a violation of a contract or agreement, which can result in legal action. In personal relationships, a breach of promise can lead to disappointment, mistrust, and the breakdown of trust between two parties. Regardless of the situation, it is important to honor commitments and obligations to maintain healthy relationships and uphold integrity.