1. Tall arborescent yucca of southwestern United States
   - soapweed, soap-weed, Yucca elata

Derived forms: soap trees

Type of: yucca

• Ornithogalum pyrenaicum
• Ornithogalum thyrsoides
• Ornithogalum umbellatum
• ornithological
• ornithologist
• ornithology
• ornithomimid
• Ornithomimida
• ornithopod
• ornithopod dinosaur
• Ornithopoda
• ornithopter
• Ornithorhynchidae
• Ornithorhynchus
• Ornithorhynchus anatinus
• ornithosis
• Orobanchaceae
• orogeny
• orography
• oroide
• orology
• Orono
• Orontium
• Orontium aquaticum
• oropharyngeal