There are a total of 64 11-letter words containing 'yb', and the number may vary in different dictionaries. You can specify the dictionary and order.

• babyboomers ₂₅
• bellyboards ₂₂
• bellybutton ₂₃
• bodyboarder ₂₁
• bodybuilder ₂₃
• chalybeates ₂₂
• cyberattack ₂₆
• cybercrooks ₂₆
• cybernation ₂₁
• cybernetics ₂₃
• cyberphobes ₂₇
• cyberphobia ₂₇
• cyberphobic ₃₀
• cyberspaces ₂₅
• cybersphere ₂₄
• cyberspying ₂₇
• cyberthreat ₂₁
• donnybrooks ₂₃
• hybridisers ₁₉
• hybridising ₂₂
• hybridities ₁₉
• hybridizers ₂₈
• hybridizing ₃₁
• keyboarders ₂₁
• keyboarding ₂₄
• keyboardist ₂₁
• molybdenite ₂₂
• molybdenums ₂₆
• monohybrids ₂₃
• piggybacked ₃₁
• psilocybins ₂₄
• rekeyboards ₂₁
• stickybeaks ₂₇
• storyboards ₁₇
• stringybark ₂₃
• sybaritisms ₁₉
• teenybopper ₂₃
• volleyballs ₂₄
• whirlybirds ₂₃
• woollybutts ₂₂
• beautyberry ₂₁
• bodyboarded ₂₁
• cybernating ₁₉
• cyberspeaks ₂₄
• cybersurfer ₂₁
• hybridomata ₂₂
• polybagging ₂₁
• aryballoses ₁₆
• bathybiuses ₂₁
• busybodying ₂₃
• corybantism ₂₀
• cybercrimes ₂₂
• dickeybirds ₂₄
• dihybridism ₂₃
• gooneybirds ₁₈
• graybearded ₁₉
• greybearded ₁₉
• molybdenous ₁₉
• polybasites ₁₈
• polyhybrids ₂₅
• sybaritical ₁₈
• thingamybob ₂₄
• tickettyboo ₂₂
• woollybacks ₂₅

There are 64 11-letter words containing yb in the well-known word game dictionary, 33 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 50 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 40 in the Words with Friends (WWF) dictionary.