Crossword clues for the word: RIER The word RIER has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for RIER Showing 1 to 5 of 5 results Clue(s) Whale-oil cask Whale-oil container Whaler's cask. Whaler's oil cask Whaling cask.