Exocentric is an adjective that describes something that cannot be classified by its own features. It is commonly used in linguistics to describe phrases or words that do not have a headword or a main noun. Synonyms for exocentric include anomalous, unnatural, abnormal, irregular, peculiar, atypical, and strange. These words describe something that is not typical or expected within its context. Exocentric phrases or expressions are often difficult to understand and can be confusing to non-native speakers. In general, exocentricity is an unusual characteristic that represents a deviation from standard or conventional patterns.