There are a total of 38 4-letter words containing 'ly', and the number may vary in different dictionaries. You can specify the dictionary and order.

• ably ₁₀
• agly ₉
• ally ₈
• coly ₁₀
• duly ₉
• eely ₇
• flys ₁₀
• holy ₉
• idly ₈
• illy ₈
• inly ₈
• lily ₈
• lyes ₇
• lyke ₁₁
• lynx ₁₅
• lyre ₇
• lyse ₇
• moly ₁₀
• oily ₇
• only ₈
• paly ₁₀
• pily ₁₀
• poly ₁₀
• rely ₇
• ruly ₈
• ugly ₁₀
• waly ₁₀
• wily ₁₀
• lych ₁₂
• owly ₁₀
• guly ₈
• lyam ₉
• lyme ₉
• lyms ₉
• lyne ₇
• lyra ₇
• lyte ₇
• puly ₉

There are 38 4-letter words containing ly in the well-known word game dictionary, 28 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 36 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 28 in the Words with Friends (WWF) dictionary.