Great Scott! is an exclamation of surprise or dismay, often used to express shock or disbelief. The crossword solutions for this term are WOW (3 letters), HEAVENS (7 letters), YIPES (5 letters), EGAD (4 letters), EGADS (5 letters), DRED (4 letters), WALTER (6 letters), SIRWALTER (9 letters), and HOLYMACKEREL (12 letters). These words all express surprise or shock, and can be used as alternatives to Great Scott!