There are a total of 46 10-letter words containing 'bird', and the number may vary in different dictionaries. You can specify the dictionary and order.

• birdbrains ₁₈
• birdhouses ₁₇
• birdliming ₂₁
• birdstrike ₁₈
• birdtables ₁₈
• blackbirds ₂₅
• bowerbirds ₂₀
• cedarbirds ₁₈
• dollarbird ₁₇
• friarbirds ₁₇
• gibberbird ₂₂
• grassbirds ₁₆
• honeybirds ₁₉
• indigobird ₁₈
• lotusbirds ₁₆
• marshbirds ₁₉
• mousebirds ₁₈
• nightbirds ₁₉
• riflebirds ₁₈
• shorebirds ₁₆
• snakebirds ₁₉
• stitchbird ₁₉
• sugarbirds ₁₇
• tailorbird ₁₅
• tinkerbird ₁₉
• tropicbird ₂₀
• waterbirds ₁₇
• wattlebird ₁₈
• weaverbird ₂₁
• whalebirds ₂₀
• whirlybird ₂₂
• widowbirds ₂₁
• birddogged ₁₇
• dollybirds ₁₇
• heathbirds ₁₉
• moosebirds ₁₅
• moundbirds ₁₆
• bishopbird ₂₀
• dickeybird ₂₃
• dickybirds ₂₃
• gooneybird ₁₇
• muttonbird ₁₅
• skunkbirds ₂₁
• stiltbirds ₁₃
• stormbirds ₁₅
• yellowbird ₁₉

There are 46 10-letter words containing bird in the well-known word game dictionary, 22 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 34 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 32 in the Words with Friends (WWF) dictionary.