Protuberancies refer to any part of an object or organism that juts out or projects prominently. Synonyms for this word include protrusions, bumps, lumps, bulges, swellings, elevations, and prominences. Other related words that can be used to replace protuberancies include growths, tumors, nodules, humps, hunches, and knobs. The usage of synonyms can help add variety and nuance to any written or spoken language. It is important to choose the most appropriate synonym based on the context of the sentence and the intended meaning. Using synonyms also helps to avoid repetition and makes the language more engaging and interesting.