From Japanese-English FreeDict Dictionary ver. 0.1:
河豚 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, 鰒 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 鮐 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 魨 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 鯸 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 鯺 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, ふぐ /ɸˈɯᵝɡɯᵝ/, (河豚) (out-dated or obsolete kana usage) ふく /ɸˈɯᵝkɯᵝ/, (河豚) (out-dated or obsolete kana usage) ふくべ /ɸɯᵝkˈɯᵝbe̞/, (河豚) かとん /kˈäto̞ɴ/, () フグ /ɸˈɯᵝɡɯᵝ/
(noun (common) (futsuumeishi))
Note: word usually written using kana alonepuffer fish, blow fish, fugu, globefish, swellfish