Breach of promise and Breach of trust

Breach of promise noun - Failure to keep a promise (of marriage).

Breach of trust and breach of promise are semantically related in unexcused failure to do duty topic. In some cases you can use "Breach of trust" instead a noun phrase "Breach of promise".

Breach of trust noun - Violation (either through fraud or negligence) by a trustee of a duty that equity requires of him.

Breach of promise and breach of trust are semantically related in unexcused failure to do duty topic. You can use "Breach of promise" instead a noun phrase "Breach of trust".