When you're searching for a way to describe something different or out of the ordinary, there are a variety of synonyms for "unusual" that you could employ. For example, "peculiar" suggests something unique or odd, while "eccentric" connotes something that deviates sharply from the norm. "Atypical" implies something that is not typical or common, while "idiosyncratic" may describe something that is specific to an individual or group. "Quirky" could imply something that is playful or whimsical, whereas "aberrant" suggests something that is deviant or abnormal. Other synonyms might include "offbeat," "nonconformist," or "nontraditional," each of which conveys a different aspect of something that is unusual or unexpected.