misuse, abuse -- (improper or excessive use; "alcohol abuse"; "the abuse of public funds")
Overview of verb misuse
The verb misuse has 2 senses
misapply, misuse -- (apply to a wrong thing or person; apply badly or incorrectly; "The words are misapplied in this context"; "You are misapplying the name of this religious group")
pervert, misuse, abuse -- (change the inherent purpose or function of something; "Don't abuse the system"; "The director of the factory misused the funds intended for the health care of his workers")