疯子 /fēngzi/ meaning in English

lunatic [lunatics]▼(insane person)
noun
[UK: ˈluː.nə.tɪk] [US: ˈluː.nə.ˌtɪk]

madman [madmen]▼(an insane man)
noun
[UK: ˈmæd.mən] [US: ˈmæd.ˌmæn]

maniac [maniacs]▼(insane person)
noun
[UK: ˈmeɪ.nɪæk] [US: ˈmeɪ.ni.ˌæk]

psycho [psychos]▼(person acting in a bizarre or dangerous manner)
noun
[UK: ˈsaɪk.əʊ] [US: ˈsaɪko.ʊ]