There are a total of 32 11-letter words containing 'riva', and the number may vary in different dictionaries. You can specify the dictionary and order.

• contrivance ₂₃
• deprivation ₂₀
• derivations ₁₇
• derivatives ₂₀
• derivatized ₂₆
• derivatizes ₂₅
• drivability ₂₂
• outrivaling ₂₀
• outrivalled ₁₉
• privateered ₁₉
• privateness ₁₉
• privatisers ₁₈
• privatising ₂₁
• privatively ₂₅
• privatizers ₂₇
• privatizing ₃₀
• reprivatize ₂₇
• semiprivate ₂₁
• charivaried ₂₀
• arrivancies ₁₆
• contrivable ₁₈
• corivalling ₁₇
• corivalries ₁₆
• corivalship ₂₁
• corrivalled ₁₇
• deprivative ₂₀
• derivatised ₁₆
• derivatises ₁₅
• marivaudage ₁₈
• reprivatise ₁₆
• trivalences ₁₆
• trivalvular ₁₇

There are 32 11-letter words containing riva in the well-known word game dictionary, 17 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 32 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 18 in the Words with Friends (WWF) dictionary.