Informalities refer to actions, behaviors, or language that are not strict or official. Synonyms for informalities include casualness, informality, nonchalance, spontaneity, familiarity, ease, simplicity, and naturalness. When you act informally, you may throw away official rules or procedures and behave freely. Informalities often happen in social or relaxed situations when there is no need to be formal or follow strict protocols. However, informalities can also occur in more formal settings, where you might break from traditional behaviors or expectations. No matter the context, synonyms for informalities accurately convey the free, easygoing, and relaxed nature of these behaviors.