Pattern
/\b(\w+)\s+\1\b/
Sample text
This is is a test the the problem no duplicates hereTest this pattern in the editor
Duplicate words
Catch accidental repeated words like the the.
Related patterns
Email addresses
Capture local and domain parts from common email shapes.
24-hour time
Match HH:MM or HH:MM:SS clock times.
URL slugs
kebab-case slugs for routes and CMS paths.
US ZIP codes
5-digit ZIP or ZIP+4.
Russian postal codes
Six-digit Russian postal index.
USD amounts
Dollar amounts with optional thousands and cents.