The Recursive Redaction
A whistleblower sent us a leaked document, but corporate got to it first and redacted the sensitive information. However, they made a crucial mistake in their redaction process. The document reads: 'The secret project codename is ████████████. For verification, we use a checksum: the codename's MD5 hash is 8f14e45fceea167a5a36dceaf8e5e5c4, and its length is 7 characters.' Intelligence suggests the redaction team used a common English word from the top 1000 most frequent words list. Can you recover the original codename?