1) Diseased person 2) Obsessive type 3) Sick person 4) Sufferer 1) Fanatic 2) Madman 
• (a.) Alt. of Monomaniacal • (n.) A person affected by monomania.
A person affected by monomania. ... See: monomaniacal. ... (14 Mar 2000) ... 
Mon`oma'ni·ac noun A person affected by monomania. 
Type: Term Pronunciation: mon′ō-mā′nē-ak Definitions: 1. One exhibiting monomania. 2. Characterized by or relating to monomania.
[n] - a person suffering from monomania
monomania, monomaniac 1. A form of insanity in which the patient is irrational on only one subject (one topic, one idea, etc.). 2. A psychosis marked by the limitation of the symptoms rather strictly to a certain group, as the delusion in paranoia.
noun a person suffering from monomania