1. Having no owner
   - ownerless

Antonym: owned

• Mount Pinatubo
• Mount Ranier
• Mount Ranier National Park
• Mount Rushmore
• Mount Rushmore State
• Mount Saint Helens
• Mount Shasta
• Mount Sherman
• Mount Sinai
• Mount St. Helens
• Mount Tacoma
• mount up
• Mount Vernon
• Mount Vesuvius
• Mount Whitney
• Mount Wilson
• mountable
• mountain
• mountain alder
• mountain andromeda
• mountain anemone
• mountain ash
• mountain avens
• mountain azalea
• mountain beaver