1) Arson 1) Cacoethes 2) Impulse to start fires 3) Light-mindedness 4) Mania 5) Passion 
fire or starting fires
Pyromania is an impulse control disorder in which individuals repeatedly fail to resist impulses to deliberately start fires, in order to relieve tension or for instant gratification. The term pyromania comes from the Greek word πῦρ (pyr, fire). Pyromania and pyromaniacs are distinct from arson, the pursuit of personal, monetary or political g...
• (n.) An insane disposition to incendiarism.
impulse-control disorder characterized by the recurrent compulsion to set fires. The term refers only to the setting of fires for sexual or other ...
(pi″ro-ma´ne-ә) an impulse control disorder consisting of a compulsion to set fires or watch fires, in the absence of monetary or other material gain to the person. The pyromaniac gets intense pleasure and emotional relief from these activities.
Pyr'o·ma'ni·a noun [ Pyro- + mania .] An insane disposition to incendiarism. 
Type: Term Pronunciation: pī′rō-mā′nē-ă Definitions: 1. A morbid impulse to set fires. Synonyms: incendiarism
[n] - an uncontrollable desire to set fire to things
pyromania, pyromaniac Insanity characterized by an impulse to set things on fire; a mania for incendiarism.
noun an uncontrollable desire to set fire to things
a compulsion to set things on fire.