головоломка meaning in English

brain-teaser▼(a complex riddle or puzzle)
noun
[UK: ˈbreɪn tiː.zə(r)] [US: ˈbreɪn tiː.zər]

conundrum [conundrums]▼(difficult question or riddle)
noun
[UK: kə.ˈnʌn.drəm] [US: kə.ˈnən.drəm]

enigma [enigmata]▼(riddle, or a difficult problem)
noun
[UK: ɪ.ˈnɪɡ.mə] [US: ə.ˈnɪɡ.mə]

jigsaw puzzle [jigsaw puzzles]▼(type of puzzle)
noun
[UK: ˈdʒɪɡ.sɔː ˈpʌz.l̩] [US: ˈdʒɪg.ˌsɒ ˈpʌz.l̩]

puzzle [puzzles]▼(game for one person)
noun
[UK: ˈpʌz.l̩] [US: ˈpʌz.l̩]