Misnomer /(?)/

Mis·no·mer

Misnomer

n.
  1. The misnaming of a person in a legal instrument, as in a complaint or indictment; any misnaming of a person or thing; a wrong or inapplicable name or title.
    Many of the changes, by a great misnomer, called parliamentary “reforms”.
    The word “synonym” is fact a misnomer.
    — Whately.

Misnomer

v. t.
  1. To misname. [R.]