1. Of or relating to or shaped like a pentagon
   - pentagonal

See also: pentagon

• aromatic compound
• aromatic hydrocarbon
• aromatise
• aromatize
• Arouet
• around
• around the bend
• around-the-clock
• arousal
• arouse
• aroused
• arouser
• Arp
• arpeggio
• arpent
• arquebus
• arrack
• arraign
• arraignment
• arrange
• arranged
• arrangement
• arranger
• arranging
• arrant