misnomer

UK: /ˌmɪsˈnəʊmər/ — US:/mɪsˈnoʊmɚ/ From Merriam Webster:The term misnomer can refer both to the use of an incorrect or inappropriate designation (as in “it’s a misnomer to call an orca a ‘killer whale’”) or to the designation itself. Regardless, there’s no mistaking the source of misnomer: it comes from the Anglo-French verb mesnomer (“to misname”) [ ]