maniacal
American Heritage Dictionary:
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ma·ni·a·cal
(mə-nī'ə-kəl) 
also ma·ni·ac (mā'nē-ăk')
adj.
also ma·ni·ac (mā'nē-ăk')adj.
- Suggestive of or afflicted with insanity: a maniacal frenzy.
- Characterized by excessive enthusiasm or excitement: a maniacal interest in gambling.
Roget's Thesaurus:
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maniacal
adjective
- Afflicted with or exhibiting irrationality and mental unsoundness: brainsick, crazy, daft, demented, disordered, distraught, dotty, insane, lunatic, mad, maniac, mentally ill, moonstruck, off, touched, unbalanced, unsound, wrong. Informal bonkers, cracked, daffy, gaga, loony. Slang bananas, batty, buggy, cuckoo, fruity, loco, nuts, nutty, screwy, wacky. Chiefly British crackers. Law non compos mentis. Idioms: around the bend, crazy as a loon, mad as a hatter, not all there, nutty as a fruitcake, offout ofone's head, off one's rocker, of unsound mind, out of one's mind, sick in the head, stark raving mad. See sane/insane.
American Heritage Stedman's Medical Dictionary:
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ma·ni·a·cal
(mə-nī'ə-kəl) or ma·ni·ac (mā'nē-ăk')
adj.
adj.
Suggestive of or afflicted with insanity.
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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Roget's Thesaurus
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 byHoughton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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American Heritage Stedman's Medical Dictionary
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.
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Random House Word Menu
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