Crossword clues for the word: BESURE The word BESURE has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for BESURE Showing 1 to 9 of 9 results Clue(s) 'How Can I ___?' Have certainty. Have no doubt Have no doubts Have no reservations Make 100% certain Make absolutely certain Make certain To ___ (certainly).