- water penetration
- water permeability
- water pier
- water pileup
- water pipeline
- water piping
- water plug
- water pocket
- water pollutant
- water pollution
- water polo
- water ponding
- water position
- water post
- water power
- water pox
- water precooler
- water preheater
- water pressure
- water projection
- water proof
- water propeller
- water protection
- water pump
- water purification
- water purifier
- water putty
- water quench
- water quenching
- water race
- water raising
- water rate
- water reclamation
- water recorder
- water recovery
- water rectifier
- water reducer
- water refrigeration
- water refrigerator
- water regime
- water removal
- water rental
- water repellant
- water repellency
- water requirement
- water requirements
- water research
- water reserve
- water reservoir
- water resistance
- water resisting
- water resource
- water resources
- water retention
- water return
- water rheostat
- water right
- water ring
- water sample
- water sampler
- water sampling
- water saturation
- water scheme
- water screen
- water screw
- water scrubber
- water seal
- water seasoning
- water seepage
- water separator
- water sepeostat
- water service
- water shooting
- water shortage
- water slope
- water soaked
- water softener
- water softening
- water space
- water sphere
- water sports
- water spotting
- water spray
- water sprayer
- water spraying
- water stability
- water stage
- water stain
- water station
- water steam
- water stemming
- water still
- water stop
- water storage
- water strainer
- water stream
- water string
- water supplier
- water supply
- water surface