Antonyms for the word rusticisms may include polished language, refined expressions, urban language, or cosmopolitanism. Rusticisms are often associated with rural, unpolished, or unsophisticated language, whereas their antonyms suggest a more cultured, sophisticated, or worldly manner of communicating. Synonyms for the antonyms of rusticisms might include eloquence, erudition, or articulacy, and these words might be used to describe someone who is well-educated, well-traveled, or urbane. While rusticisms may be charming in some contexts, they are not always appropriate or effective in more formal situations, and it can be helpful to have a range of vocabulary to draw on to communicate effectively in different settings.