In lang=en terms the difference between promise and acknowledge
is that
promise is to give grounds for expectation, especially of something good while
acknowledge is to admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to
acknowledge the being of a god.
As verbs the difference between promise and acknowledge
is that
promise is to commit to something or action; to make an oath; make a vow while
acknowledge is to admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to
acknowledge the being of a god.
As a noun promise
is an oath or affirmation; a vow.