Papilliform is a term that is used to describe something that is shaped like a small, raised nipple or bump. Some common synonyms for papilliform include polypoid, protrusive, projecting, and nipple-shaped. Other related words that can be used to describe similar shapes or structures include conical, bulbous, knob-like, and domed. Depending on the context and the specific application of the word, other synonyms for papilliform might include wart-like, cystic, or tumorous. Overall, there are many different ways to describe this type of physical characteristic, and choosing the right synonym will depend on the specific context and audience for a given piece of writing or communication.