N madman, lunatic, maniac, bedlamite, candidate for Bedlam, raver, madcap, crazy, energumen, automaniac, monomaniac, dipsomaniac, kleptomaniac, hypochondriac (low spirits), crank, Tom o'Bedlam, dreamer, rhapsodist, seer, highflier, enthusiast, fanatic, fanatico, exalte, knight errant, Don Quixote, idiot.

For further exploring for "energumen" in Webster Dictionary Online

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