1. In a random manner
   - randomly, indiscriminately, haphazardly, arbitrarily, at random, every which way 
2. Without having a choice
   - nolens volens

Encyclopedia: Willy-nilly

• waxiness
• waxing
• waxlike
• waxmallow
• waxwing
• waxwork
• waxy
• waxycap
• way
• way of life
• way station
• way to go
• way-out
• waybill
• wayfarer
• wayfaring
• wayfaring tree
• Wayland
• Wayland the Smith
• waylay
• waylayer
• wayleave
• waymark
• Wayne
• Wayne Gretzky