Crossword clues for the word: PERMAFROST The word PERMAFROST has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for PERMAFROST Showing 1 to 7 of 7 results Clue(s) Arctic drilling challenge Arctic soil phenomenon Continuously frozen subsoil of arctic regions Frozen ground ruined farmer's pot (10) Hard-frozen under-pinning of Thule. It covers much of Alaska Layer of soil that never thaws