hydronymy Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the study of names of bodies of water. Example Sentence Rivers, lakes, and oceans are all part of hydronymy. More Example Sentences Students learn hydronymy in geography class. Synonyms water naming; aquatic nomenclature Antonyms landforms; geography Hear It! Say It! Write It! hydronymy Switch to cursive Start Share with your friends: