"More amphibious" refers to something that can operate both on land and in water. Synonyms for this term can include "versatile," "adaptable," "multifunctional," and "flexible." These words suggest the ability to perform various tasks or functions in a variety of environments, including both aquatic and terrestrial settings. Other potential synonyms might include phrases such as "multipurpose," "all-terrain," "omnifunctional," or "dual-capable." Each of these terms has slightly different connotations and associations, but all indicate that the object or entity in question is capable of functioning effectively and efficiently in a range of different conditions.