Is it ‘copacetic’, ‘copasetic’, or ‘copesetic’?
The standard spelling is copacetic. The variant spellings copasetic and copesetic are also listed as acceptable by the Merriam-Webster dictionary, but they’re less common.
The origin of the word is unclear (it’s thought to have originated as slang in the 20th century), which is why various spellings are deemed acceptable.
Scribbr’s free Grammar Checker can help ensure you use words like ‘copacetic’ correctly in your writing.