- rock explosive
- rock filling
- rock formation
- rock forming
- rock gas
- rock making
- rock ore
- rock pediment
- rock phosphate
- rock product
- rock salt
- rock sample
- rock shelter
- rock slide
- rock slope
- rock step
- rock tar
- rock terrace
- rock unit
- rock weathering
- rock well
- rocket fuel
- rocking stone
- rocky coast
- rocky soil
- rod basket
- rod elevator
- rod hanger
- rod packing
- rod string
- rodenticide
- rodingite
- Rohrbach solution
- roll stand
- roll sulphur
- roll welding
- roller drying
- rolling country
- roof saturant
- roofing asphalt
- root crack
- rollback
- rolled glass
- roller bit
- roller crusher
- roller press
- Rollin film
- rolling stock
- roof fall
- roofing felt
- root zone
- rope clip
- rope driving
- rope splice
- ropy lava
- rose
- rosin
- rotary displacement
- rotary dryer
- rotary filter
- rotary mud
- rotary pump
- rotary table
- rotating electrode
- rotating liquid
- rotating scratcher
- rotational constant
- rotational frequency
- rotogravure printing
- rouge
- rough finish
- rough gas
- rough ground
- rough surface
- rough turn
- round
- round coal
- rolling crusher
- rolling resistance
- Roman effect
- roof arch
- roof collapse
- roof control
- roof strata
- roof subsidence
- roofing slab
- rope chopper
- rope conveyor
- rope drive
- rope grease
- rope speed
- rope strand
- ropy structure
- roscherite
- rosenbuschite
- rosickyite
- rosin jack
- rosin oil
- rosin spirit
- rosthornite