The only 15-letter word that can be spelled without repeating a letter is “uncopyrightable”.

Keep practicing — related questions

• only fiften letter word that can be spelled without repeating a letter is "UNCOPYRIGHTABLE"....
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
• "Copyrightable" is the longest word in the English language that can be written without repeating a letter?
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