The phrase "deliberate breaking of faith" refers to intentionally breaking a promise or violating trust. Synonyms for this phrase include betrayal, disloyalty, treachery, backstabbing, falseness, and perfidy. Betrayal implies a breach of loyalty or trust, while disloyalty refers to a lack of faithfulness or commitment. Treachery describes a deliberate act of betrayal, and backstabbing is used to describe a betrayal from someone who was trusted. Falseness refers to a lack of sincerity or honesty, and perfidy implies deceit or dishonesty. All of these words convey a sense of betrayal and a lack of integrity, and can be used interchangeably with "deliberate breaking of faith".