megalomania

As nouns the difference between megalomania and ennui

is that megalomania is megalomania while ennui is a gripping listlessness or melancholia caused by boredom; depression.

As nouns the difference between megalomania and aspersion

is that megalomania is megalomania while aspersion is an attack on somebody's reputation or good name, often in the phrase to cast aspersions upon… .

As a noun megalomania

is megalomania.

As an adjective egotistical is

tending to talk excessively about oneself.

As nouns the difference between megalomania and narcissist

is that megalomania is a psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence while narcissist is person full of egoism and pride.

As nouns the difference between megalomania and thief

is that megalomania is megalomania while thief is one who has carried out a theft.

As nouns the difference between megalomania and egotism

is that megalomania is megalomania while egotism is a tendency to talk excessively about oneself.

As nouns the difference between megalomania and pride

is that megalomania is a psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence while pride is the quality or state of being proud; inordinate self-esteem; an unreasonable conceit of one's own superiority in talents, beauty, wealth, rank etc., which manifests itself in lofty airs, distance, reserve and often contempt of others.

As a verb pride is

to take or experience pride in something, be proud of it.

As nouns the difference between megalomania and maniac

is that megalomania is a psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence while maniac is an insane person, especially one who suffers from a mania.

As nouns the difference between megalomania and hegemony

is that megalomania is megalomania while hegemony is (formal) domination, influence, or authority over another, especially by one political group over a society or by one nation over others.