There are a total of 23 7-letter words containing 'geo', and the number may vary in different dictionaries. You can specify the dictionary and order.

• burgeon ₁₄
• dudgeon ₁₃
• dungeon ₁₃
• geodata ₁₀
• geodesy ₁₂
• geoduck ₁₈
• geoidal ₁₁
• geology ₁₄
• geopark ₁₆
• georgic ₁₄
• geotags ₁₁
• gudgeon ₁₄
• hugeous ₁₃
• pigeons ₁₃
• surgeon ₁₁
• widgeon ₁₄
• wigeons ₁₃
• geofact ₁₃
• geogeny ₁₂
• geogony ₁₂
• geomant ₁₀
• murgeon ₁₀
• pidgeon ₁₁

There are 23 7-letter words containing geo in the well-known word game dictionary, 14 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 20 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 17 in the Words with Friends (WWF) dictionary.