RDF

1. Radio direction-finding (or -finder)
2. Refuse-derived fuel

• kinetic theory
• kinetochore
• kinetochores
• kinetograph
• kinetographs
• kinetoplast
• kinetoscope
• kinetoscopes
• kinfolk
• king
• king-apple
• king-apples
• king-archon
• king-archons
• king-at-arms
• kingbird
• kingbirds
• kingbolt
• kingbolts
• King Charles's head
• King Charles spaniel
• king cobra
• king cobras
• king crab
• king crabs