Crossword clues for the word: OSTARS The word OSTARS has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for OSTARS Showing 1 to 5 of 5 results Clue(s) "To astronomers, they're hot and blue" Certain spectral types. Hot suns Ultrahot masses Very hot celestial orbs