There are a total of 14 9-letter words containing 'words', and the number may vary in different dictionaries. You can specify the dictionary and order.

• buzzwords ₃₅
• cusswords ₁₇
• forewords ₁₆
• headwords ₁₆
• loanwords ₁₅
• overwords ₁₇
• passwords ₁₆
• stopwords ₁₆
• swordsman ₁₇
• swordsmen ₁₇
• wordsmith ₁₈
• backwords ₂₁
• codewords ₁₆
• owrewords ₁₆

There are 14 9-letter words containing words in the well-known word game dictionary, 11 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 14 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 11 in the Words with Friends (WWF) dictionary.