Tolerate

The clue is asking for the word that is synonymous with “tolerate.” The answer to the crossword question is “ABIDE.” To “tolerate” something means to put up with it or endure it, while “abide” means to accept or tolerate. They are interchangeable in many contexts and can be used to convey similar meanings. Therefore, the answer to the crossword question “Tolerate is ABIDE” means that the word ABIDE is a suitable synonym for the word tolerate.