RDF

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

• snowdrops
• snowdrop tree
• snowdrop trees
• snowed
• snowed in
• snowed under with
• snowed up
• snow-eyes
• snowfall
• snowfalls
• snow-fed
• snow fence
• snow fences
• snowfield
• snowfields
• snow finch
• snow finches
• snowflake
• snowflakes
• snow flea
• sportively
• sportiveness
• sportivenesses
• sportless
• sport one's oak