Crossword clues for the word: INVAR The word INVAR has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for INVAR Showing 1 to 5 of 5 results Clue(s) Alloy of iron and nickel Alloy of iron and nickel discovered by Charles Edouard Guillaume Alloy of nickel and iron Nickel/steel alloy Trademark of an expansion-resistant alloy