The antonyms for the word "more mossgrown" are numerous, as the word itself is quite specific. A few antonyms might include "pristine," "clean," "bare," or "unadorned." Other possibilities might include "modern," "polished," or "sleek." Ultimately, the antonyms for "more mossgrown" depend on the context in which the word is being used. For example, if the word is used to describe a historic building, then the antonyms might include "new," "fresh," or "refurbished." On the other hand, if the word is used to describe a natural setting, then the antonyms might include "sterile," "manicured," or "artificial.