The definition of allegiance means giving a promise to be loyal, or the action of actually being loyal and on someone's side.
The condition or quality of being constant; changelessness.
An oath of such loyalty
Fidelity is defined as being loyal or faithful, or an accurate copy.
Quality, state, or instance of being loyal
A binding contract, promise, moral responsibility, etc.
Find another word for steadfastness. In this page you can discover 17 synonyms, antonyms, idiomatic expressions, and related words for steadfastness, like: allegiance, constancy, faithfulness, fealty, fidelity, loyalty, continue, obligation, staunchness, unselfishness and fortitude.