Crossword clues for the word: OOOS The word OOOS has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for OOOS Showing 1 to 5 of 5 results Clue(s) 'XXX's and --' (Trisha Yearwood country hit) Add these to go from millionaire to billionaire Some tic-tac-toe winners They turn millionaires into billionaires? What's needed to go from millionaire to billionaire