Antonyms for the word "non-conformities" can be conformity, adherence, or compliance. To conform means to follow the rules, standards or expectations of a group or society. Adherence implies sticking to a set of guidelines or principles while complying means meeting the requirements or demands of an authority. In contrast, non-conformities refer to departures, deviations, or variances from a norm or standard which may result in errors, defects, or non-compliances. Ultimately, the antonyms of non-conformities share a common thread of following, adhering to or complying with established norms, rules or standards.