Rock climbers enjoy the thrill of scaling mountains.

Rocket cars are the future of transportation.

Rocket festivals are celebrated in many countries around the world.

I saw a group of children playing with rocking-horses in the park.

Rock oils are commonly used in the production of lubricants.

Rocket planes are a fascinating form of aviation.

Rocket larkspurs are beautiful flowers that bloom in the summer.

The rocket motors ignited and propelled the spacecraft into orbit.

Rocket ships are used to explore outer space.

Rock hounds love to search for rare minerals and fossils.