R

rooted to the spot

rootball

rootage

root-canal therapy

root treatment

root test

root system

root sheath

root rot

root resection

root pressure

root position

root of unity

root of tooth

root of tongue

root of the matter

root of nail

root of lung

root nodule

root mean square

root knot

root hair

root graft

root filament

splitting field

root doctor

root division

root crop

root climber

root caries index