1. Lacking proof or substantiation

See also: unproved, unproven

• one-tenth
• one-third
• one-thirty-second
• one-thousandth
• one-to-one
• one-track
• one-track mind
• one-trillionth
• one-twelfth
• one-two
• one-upmanship
• one-way
• one-way light time
• one-way street
• one-winged
• one-woman
• one-year
• one-year-old
• Onega
• Oneida
• oneiric
• oneirism
• oneiromancer
• oneiromancy
• oneness