There are a total of 34 7-letter words containing 'xo', and the number may vary in different dictionaries. You can specify the dictionary and order.

• axolotl ₁₆
• axoneme ₁₈
• boxouts ₁₈
• buxomer ₂₁
• buxomly ₂₄
• claxons ₁₉
• exocarp ₂₀
• exoderm ₁₈
• exogamy ₂₁
• exogens ₁₇
• exopods ₁₈
• exordia ₁₅
• exosmic ₂₀
• exotica ₁₇
• exotics ₁₇
• exotism ₁₇
• flexors ₁₈
• hexones ₁₇
• hexosan ₁₇
• hexoses ₁₆
• ixodids ₁₆
• klaxons ₂₀
• monaxon ₁₉
• myxomas ₂₂
• plexors ₁₈
• quixote ₂₄
• toxoids ₁₅
• uxorial ₁₆
• exonyms ₁₉
• diaxons ₁₅
• exodist ₁₅
• exomion ₁₆
• oxonium ₁₆
• triaxon ₁₄

There are 34 7-letter words containing xo in the well-known word game dictionary, 27 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 33 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 28 in the Words with Friends (WWF) dictionary.