NTSB — Common Crossword Answer

Why is NTSB common in crosswords?

NTSB is a 4-letter crossword answer that appears regularly in published crossword puzzles. Constructors rely on versatile entries like NTSB to fill tight grid spaces and connect longer theme answers. Its letter pattern fits well into a variety of grid structures. Short entries like this are especially valuable in compact crossword formats such as daily minis.