ground·nut 
(groundnŭt′)
(groundnŭt′)n.
1.
a. A climbing vine (Apios americana) in the pea family, native to eastern North America, having compound leaves, clusters of fragrant brownish flowers, and small edible tubers.
b. Any of several plants having underground tubers or nutlike parts.
c. The tuber or nutlike part of such a plant.
2. Chiefly British and South Atlantic US A peanut.
- water-soluble
- water spaniel
- watersports
- waterspout
- water sprite
- water strider
- water supply
- water system
- water table
- water taxi
- waterthrush
- watertight
- water tower
- water turkey
- water under the bridge
- water vapor
- water-vascular system
- waterway
- waterweed
- water wheel
- waterwheel
- water wings
- water witch
- waterworks
- watery