Write and Wrong

A bad health condition; a disease

Malady

A word used the wrong way; usually with humorous results

Malapropism

illness believed to be spread by bad air, actually spread by mosquitoes

Malaria

Having bad feelings toward someone or something; spite, hatred

Malevolent

Desiring harm to someone or something else

Malicious

bad or harmful, producing death

Malignant

bad-smelling

Malodorous

performing one's duty in a bad or wrong way

Malpractice

bad speech; a curse

malediction

one who does wrong; a villain

malefactor