There are a total of 15 6-letter words containing 'arch', and the number may vary in different dictionaries. You can specify the dictionary and order.

• anarch ₁₂
• arched ₁₂
• archer ₁₁
• arches ₁₁
• archil ₁₂
• archly ₁₄
• archon ₁₂
• eparch ₁₄
• exarch ₁₈
• inarch ₁₂
• search ₁₁
• starch ₁₁
• archei ₁₁
• diarch ₁₂
• enarch ₁₁

There are 15 6-letter words containing arch in the well-known word game dictionary, 12 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 15 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 12 in the Words with Friends (WWF) dictionary.