OMIGOD! is an expression of surprise or shock, usually used in informal contexts. The crossword solutions for this term are EEK (3 letters), YIPE (4 letters), and EGAD (4 letters). EEK is an expression of fear or surprise, YIPE is an exclamation of surprise or alarm, and EGAD is an expression of surprise or dismay. All three words are used to express a strong emotion in response to something unexpected.