Crossword clues for the word: PERMIAN The word PERMIAN has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for PERMIAN Showing 1 to 4 of 4 results Clue(s) Amphibian geologic period Last period of the Palaeozoic era in the geological time scale Last period of the Paleozoic Era Period marked by the largest mass extinction in earth's history