There are a total of 177 6-letter words containing 'fu', and the number may vary in different dictionaries. You can specify the dictionary and order.

• aidful ₁₂
• aimful ₁₄
• armful ₁₄
• artful ₁₁
• bagful ₁₆
• boxful ₂₁
• canful ₁₅
• capful ₁₇
• carful ₁₄
• cupful ₁₈
• defund ₁₃
• defuse ₁₁
• defuze ₂₀
• doofus ₁₁
• earful ₁₁
• effuse ₁₃
• eyeful ₁₃
• fitful ₁₄
• fubbed ₁₇
• fuckup ₂₁
• fucoid ₁₄
• fucose ₁₃
• fucous ₁₄
• fuddle ₁₃
• fudged ₁₄
• fudges ₁₃
• fueled ₁₂
• fueler ₁₁
• fugato ₁₂
• fugged ₁₅
• fugios ₁₂
• fugled ₁₄
• fugles ₁₃
• fugued ₁₄
• fugues ₁₃
• fuhrer ₁₂
• fulcra ₁₄
• fulfil ₁₅
• fulgid ₁₄
• fulham ₁₆
• fullam ₁₅
• fulled ₁₃
• fuller ₁₂
• fulmar ₁₄
• fumble ₁₇
• fumers ₁₃
• fumets ₁₃
• fumier ₁₃
• fuming ₁₆
• fumuli ₁₅
• fundal ₁₃
• fundas ₁₂
• funded ₁₃
• funder ₁₂
• fundic ₁₅
• fundie ₁₂
• fundis ₁₂
• fundus ₁₃
• funest ₁₁
• fungal ₁₄
• fungic ₁₆
• fungos ₁₃
• fungus ₁₄
• funked ₁₆
• funker ₁₅
• funkia ₁₅
• funned ₁₃
• funnel ₁₃
• funner ₁₂
• furane ₁₁
• furans ₁₁
• furcae ₁₃
• furcal ₁₄
• furfur ₁₄
• furies ₁₀
• furled ₁₂
• furler ₁₁
• furore ₁₀
• furors ₁₀
• furphy ₁₇
• furred ₁₁
• furrow ₁₃
• furzes ₁₉
• fusain ₁₁
• fusees ₁₀
• fusels ₁₁
• fusile ₁₁
• fusils ₁₁
• fusing ₁₃
• fusion ₁₁
• fussed ₁₁
• fusser ₁₀
• fusses ₁₀
• fustic ₁₃
• futile ₁₁
• futons ₁₁
• futsal ₁₁
• future ₁₁
• futzed ₂₀
• futzes ₁₉
• fuzees ₁₉
• fuzils ₂₀
• fuzing ₂₂
• fuzzed ₂₉
• fuzzes ₂₈
• goofus ₁₂
• gutful ₁₄
• hatful ₁₃
• infula ₁₂
• infuse ₁₁
• ireful ₁₁
• jarful ₂₀
• joyful ₂₂
• jugful ₂₃
• kungfu ₁₈
• lapful ₁₅
• lawful ₁₅
• manful ₁₅
• mugful ₁₇
• netful ₁₂
• panful ₁₅
• potful ₁₄
• refuel ₁₁
• refuge ₁₂
• refund ₁₂
• refurb ₁₃
• refuse ₁₀
• refute ₁₀
• rueful ₁₂
• samfus ₁₃
• sinful ₁₂
• snafus ₁₁
• sobful ₁₄
• sulfur ₁₂
• tinful ₁₂
• topful ₁₄
• tubful ₁₅
• unfurl ₁₃
• useful ₁₂
• vatful ₁₅
• waeful ₁₄
• wilful ₁₅
• woeful ₁₄
• defuel ₁₀
• fucked ₁₆
• fucker ₁₅
• fusuma ₁₁
• barful ₁₁
• dinful ₁₀
• dueful ₁₀
• fueros ₉
• fuffed ₁₆
• fugies ₁₀
• fulgor ₁₀
• fullan ₉
• fulvid ₁₃
• fumado ₁₂
• fumage ₁₂
• fumous ₁₁
• furals ₉
• furder ₁₀
• fureur ₉
• furkid ₁₄
• furole ₉
• furols ₉
• fusted ₁₀
• fustet ₉
• fustoc ₁₁
• fuzzle ₂₇
• lifull ₉
• lyfull ₁₂
• madafu ₁₂
• penful ₁₁
• pepful ₁₃
• sapful ₁₁
• upfurl ₁₁
• urnful ₉

There are 177 6-letter words containing fu in the well-known word game dictionary, 137 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 171 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 143 in the Words with Friends (WWF) dictionary.