There are a total of 18 8-letter words containing 'aqua', and the number may vary in different dictionaries. You can specify the dictionary and order.

• aquacade ₂₂
• aquanaut ₂₀
• aquarial ₁₉
• aquarian ₁₉
• aquarist ₁₈
• aquarium ₂₂
• aquatics ₂₁
• aquatint ₁₉
• aquatone ₁₉
• aquavits ₂₂
• paraquat ₂₁
• seaquake ₂₂
• aquafaba ₂₂
• aquafarm ₂₂
• aquafits ₂₀
• aqualung ₁₈
• aquafers ₂₀
• aquashow ₂₃

There are 18 8-letter words containing aqua in the well-known word game dictionary, 16 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 17 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 12 in the Words with Friends (WWF) dictionary.