Appropriateness
suitability, aptness, propriety, expediency, aptitude, convenience, adequacy, seemliness, correspondence, agreeableness, seasonableness, decency, decorum, congruousness, harmony, pertinence, accordance, consonance, relevance, keeping, consistency, congeniality, applicability, compatibility, admissibility, concurrence, patness, rightness, timeliness, auspiciousness, adaptation, qualification, accommodation, assimilation, competence, eligibility.
Antonyms inappropriateness, unfitness, ineptitude.