A word of honor is a solemn promise or commitment to do something. An OATH (4 letters) is a formal, binding declaration that one will faithfully perform an action or behave in a certain way. A PLEDGE (6 letters) is a solemn promise or agreement to do or refrain from doing something. A VOW (3 letters) is a solemn promise made to a deity or saint to act in a certain way. Cum (3 letters) is a Latin term meaning 'WITH' or 'together WITH'. PAROLE (6 letters) is a promise made by a prisoner of war to not take up arms against the captor's country. All of these terms are related to a word of honor and can be used to describe a solemn promise or commitment.