- room conditions
- room constant
- room cooler
- room cooling
- room cubage
- room door
- room entry
- room heater
- room heating
- room height
- room humidistat
- room index
- room load
- room mining
- room noise
- room overheating
- room rack
- room rate
- room reverberation
- room service
- room tax
- room temperature
- room thermostat
- room ventilation
- room width
- room-free
- room-mate
- roomed
- roomer
- roomette
- roomful
- roomily
- roominess
- rooming list
- rooming-house
- roommate
- roomy
- roomy car
- roorback
- roost
- rooster
- root
- root abscess
- root barrier
- root bead
- root beer
- root canal
- root celeriac
- root chipping
- root chord
- root circle
- root cone
- root context
- root crack
- root crop
- root cylinder
- root diameter
- root director
- root directory
- root dozer
- root drum
- root face
- root fillet
- root filling
- root index
- root line
- root location
- root locus
- root mode
- root module
- root name
- root node
- root out
- root pain
- root pass
- root record
- root section
- root segment
- root square
- root surface
- root symbol
- root system
- root task
- root test
- root timber
- root treatment
- root vegetable
- root window
- root year
- root zone
- root-borer
- root-bound
- root-cap
- root-cell
- root-climber
- root-eating
- root-hairs
- root-leaf
- root-nodules
- root-pocket