There are a total of 10 10-letter words containing 'words', and the number may vary in different dictionaries. You can specify the dictionary and order.

• afterwords ₁₇
• backswords ₂₄
• catchwords ₂₂
• crosswords ₁₇
• swearwords ₁₇
• swordstick ₂₁
• watchwords ₂₂
• wordsearch ₁₉
• wordsmiths ₁₉
• guidewords ₁₆

There are 10 10-letter words containing words in the well-known word game dictionary, 8 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 10 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 9 in the Words with Friends (WWF) dictionary.