AEIOU — Common Crossword Answer

Why is AEIOU common in crosswords?

AEIOU is a 5-letter crossword answer that appears regularly in published crossword puzzles. Constructors rely on versatile entries like AEIOU to fill tight grid spaces and connect longer theme answers. Its vowel-heavy structure makes it easy to slot into many grid patterns. Medium-length entries like this work across a wide range of crossword formats, from themed puzzles to larger grids.