Allen wrenchAllen wrench /ˈælən rentʃ/ noun [countable] American English 
a tool used to turn an Allen screw SYN Allen key British English
a tool used to turn an Allen screw SYN Allen key British English- rowing machine
- Rowling, J.K. (Joanne)
- rowlock
- Rowntree Mackintosh
- royal
- Royal Academy
- Royal Academy of Music
- Royal Air Force
- Royal Albert Hall
- Royal and Ancient
- Royal Ascot
- Royal Ballet
- Royal Bank of Scotland
- royal blue
- Royal British Legion
- Royal Canadian Mounted Police
- Royal College of Art
- Royal College of Music
- Royal College of Nursing
- Royal Commission
- Royal Court
- Royal Doulton
- Royal Enclosure
- Royal Festival Hall
- royal flush