maniac

As nouns the difference between maniac and manioc

is that maniac is an insane person, especially one who suffers from a mania while manioc is the tropical plant, Manihot esculenta, from which cassava and tapioca are prepared.

As nouns the difference between taxonomy and maniac

is that taxonomy is the science or the technique used to make a classification while maniac is an insane person, especially one who suffers from a mania.

As an adjective manic

is suffering from mania; the state of abnormally elevated or irritable mood, arousal, and/or energy levels.

As a noun maniac is

an insane person, especially one who suffers from a mania.

As nouns the difference between maniac and crazy

is that maniac is an insane person, especially one who suffers from a mania while crazy is an insane or eccentric person; a crackpot.

As an adjective crazy is

insane; lunatic; demented.

As an adverb crazy is

very, extremely.