Keep a Word, Delete a Word 2.0 (Part 3)

Robin Hood

Battlecruiser Hood

range hood

Range Rover

Mars rover

Mars bar

Saloon bar

bar stool

stool pigeon

homing pigeon

passenger pigeon

passenger vehicle

Vehicle registration

registration mark

Mark Harmon

Harmon Killebrew

Harmon Kardon

Harmon Gym

gym rat

rat nest