Synonyms of 'madman'
a person who behaves recklesslyI wanted to run around outside, screaming like a madman.
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in the sense of loony
a person who behaves in a foolish mannerHe drives like a loony, far too fast!
in the sense of lunatic
a person who behaves in a foolish or erratic mannerThey must have wondered who this lunatic was, shouting and waving at them.
in the sense of nut
an eccentric or insane personI'd heard he was just some nut who lived up a tree.
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Thesaurus for madman from the Collins English Thesaurus