faithfulness

noun

1 she never doubted her husband's faithfulness:

fidelity, loyalty, constancy, devotion, trueness, true-heartedness, dedication, commitment, allegiance, adherence;

dependability, reliability, trustworthiness, staunchness, steadfastness;

historical fealty.

▷antonyms unfaithfulness.

2 the faithfulness of the description:

accuracy, precision, exactness, closeness, strictness, fairness, justness, factuality, truth, truthfulness, veracity, authenticity, reliability, dependability;

rare veridicality.

▷antonyms inaccuracy.

faithfulness Oxford Dictionary of English