1. Proceeding from natural feeling or impulse without external stimulus
   - impulsive

See also: self-generated, spontaneous

• Rudolf Ludwig Mössbauer
• Rudolf Nureyev
• Rudolf Serkin
• Rudolf Steiner
• Rudolf Virchow
• Rudolf Wurlitzer
• Rudolph Laban
• Rudra
• Rudyard Kipling
• rue
• rue anemone
• rue family
• rueful
• ruefully
• ruefulness
• RUF
• rufescent
• ruff
• ruffe
• ruffed grouse
• ruffian
• ruffianism
• ruffianly
• ruffle
• ruffle up