There are a total of 21 7-letter words containing 'root', and the number may vary in different dictionaries. You can specify the dictionary and order.

• cheroot ₁₂
• disroot ₈
• enroots ₈
• outroot ₈
• redroot ₈
• rootage ₉
• rooters ₇
• rootier ₇
• rooting ₁₀
• rootkit ₁₁
• rootled ₉
• rootles ₈
• rootlet ₈
• sheroot ₉
• taproot ₁₀
• unroots ₉
• uproots ₁₁
• rootcap ₁₁
• prootic ₁₁
• rooties ₇
• wrooted ₁₁

There are 21 7-letter words containing root in the well-known word game dictionary, 17 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.