misuser

About 0.01 uses per million words.

Meaning

1. noun A person who misuses something.
2. noun unlawful use of a right; use in excess of, or varying from, one's right

Similar words

misappropriator misapplier misplacer misutilization mismanager misnamer mislayer misstater mistreater misdoer

Often followed by

of or and is in