1. Cannot be removed or erased
   - indelible

See also: ineradicable

• Russian Orthodox
• Russian Orthodox Church
• Russian Revolution
• Russian River
• Russian roulette
• Russian Soviet Federated Socialist Republic
• Russian thistle
• Russian tumbleweed
• Russian vine
• Russian wolfhound
• Russian-speaking
• Russianise
• Russianize
• Russification
• Russify
• Russo-
• Russo-Japanese War
• Russula
• Russulaceae
• rust
• rust fungus
• rust inhibitor
• rust mite
• rust-brown
• rust-colored