“Word that becomes its own synonym if you add a "k" to the end” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.MAR is the answer to the New York Times crossword clue “Word that becomes its own synonym if you add a "k" to the end”. It was last seen in the puzzle of January 16, 2025, where it runs at 53 Down and fills 3 squares. It crosses 3 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.