faithfulness, loyalty, trueness, religion, truefulness, steadfastness, faithlessness, integrity, faithworthiness, faith, more...

infidelity, adultery, cheating

sexual fidelity, emotional fidelity, more...

high, conjugal, great, marital, absolute, sexual, scrupulous, eternal, perfect, strict, remarkable

keeping promises,   hi- (detailed),   sound quality,   promise keeping,   promises kept,   loyalty to a spouse,   realism and loyalty