1. Birthwort of the eastern United States woodlands
   - Virginia snakeroot, Virginia serpentary, Aristolochia serpentaria

Type of: Aristolochia clematitis, birthwort

• OMB
• ombre
• ombu
• ombudsman
• Omdurman
• omega
• Omega Centauri
• omega-3
• omega-3 fatty acid
• omega-6
• omega-6 fatty acid
• omelet
• omelet pan
• omelette
• omelette pan
• omen
• omental bursa
• omentum
• omeprazole
• omer
• omerta
• omicron
• omigod
• omigosh
• ominous