Antonyms for the word 'unusualnesses' would relate to the opposite of strange, uncommon, or unexpected circumstances. Commonplace, conventional, everyday, regular, or normal are among the antonyms for unusualnesses. Everyday occurrences are classified as typical or common, as opposed to unusual. A conventional perspective is the opposite of an unusual perspective. Standard is the opposite of an unusual feature or condition. In essence, the antonyms for unusualnesses convey things that are widely regarded as ordinary or familiar, as opposed to unusual occurrences.