Below you can find the Nonskid stair treads commonly contain this substance that's also found on nail files Jeopardy Words Answer. The answer to Nonskid stair treads commonly contain this substance that's also found on nail files has 5 letters. This clue belongs to the Rocks & minerals category and is part of Jeopardy Word Level 1900. If you scroll near the bottom you will find other clues and answers part of level 1900