There are a total of 21 6-letter words containing 'not', and the number may vary in different dictionaries. You can specify the dictionary and order.

• beknot ₁₄
• cannot ₁₁
• cenote ₁₀
• denote ₈
• knotty ₁₃
• notams ₁₀
• notary ₉
• notate ₇
• notchy ₁₄
• noters ₇
• nother ₉
• notice ₁₀
• notify ₁₂
• noting ₁₀
• notion ₈
• pinots ₁₀
• snotty ₉
• unknot ₁₃
• reknot ₁₀
• donnot ₇
• notour ₆

There are 21 6-letter words containing not in the well-known word game dictionary, 18 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 20 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 18 in the Words with Friends (WWF) dictionary.