[Bob Kontak]

Google search:

noun: misnomer; plural noun: misnomers

a wrong or inaccurate name or designation.
"morning sickness is a misnomer for many women, since the nausea can occur any time during the day"
a wrong or inaccurate use of a name or term.
"to call this “neighborhood policing” would be a misnomer"

So if you live where they call all soda pop "Coke" and you ask for an Orange Crush Coke or orange coke is that a misnomer?