Antonyms for the term "breach of trust" would be reliability, faithfulness, loyalty, trustworthiness, honesty, dependability, and truthfulness. These words are the opposite of "breach of trust," which refers to a failure to fulfill a promise or responsibility of trust. When someone is reliable, they can be counted on to do what they said they would do, and their honesty and truthfulness are not in question. Similarly, faithfulness and loyalty denote a commitment to the trust placed in a person, while dependability implies that someone can be trusted in a consistent manner. All of these terms reflect positive character traits that can build strong relationships based on trust and mutual respect.