The phrase "butted on" can be replaced with numerous synonyms depending on the context of the sentence. The most common synonyms for "butted on" include "intruded", "impinged", "encroached", "obtruded", and "converged". All of these words imply some form of intrusion or contact with another object or person. They can be used in a variety of contexts, from describing physical contact between objects to describing an individual's social behavior. Using synonyms for common phrases like "butted on" can help to improve the flow of writing and make it more engaging for readers.