- aristocrat
- aristocrats
- Aristophanes
- Aristophanes of Byzantium
- Aristotelean
- Aristotelian
- Aristotelian logic
- Aristotelians
- Aristotelic
- Aristotle
- arithmetic
- arithmetical
- arithmetic average
- arithmetic mean
- arithmetic progression
- arithmetics
- arithmetic sequence
- -arium
- -ariums
- Arius
- Arizona
- Arizona College of the Bible
- Arizona College of the Bible
- Arizona State University
- Arizona Western College