The word "more gnawed" implies something that has been chewed or nibbled away, often leaving a rough or uneven surface. There are several synonyms that could be used to describe a similar, but slightly different effect. For example, "eroded" suggests a gradual wearing away over time, often due to natural forces like wind or water. Similarly, "corroded" implies a more chemical process of decay and oxidation. "Chewed up" is a more colloquial term, often used to describe something that has been damaged or ruined beyond repair. Finally, "masticated" could be used to describe something that has been thoroughly chewed by an animal or person.