1. Eight
   - oct-, octo-

Encyclopedia: Octa-

• pick
• pick and choose
• pick apart
• pick at
• pick on
• pick out
• pick over
• pick up the gauntlet
• pick up the tab
• Pick's disease
• wave-off
• wave-particle duality
• waveband
• waveform
• wavefront
• wavefunction
• waveguide
• wavelength
• wavelet
• wavelike
• Wavell
• waver
• waverer
• wavering
• waveringly