ignis fatuus /igˈnis fatˈū-əs or fatˈŭ-ŭs/

1. Will-o'-the-wisp, the light produced by combustion of marsh-gas, which may lead a traveller into danger
2. Any delusive ideal or hope that may lead one astray

• Russophobic
• Russophobist
• russula
• russulae
• russulas
• rust
• rust belt
• rust-belt
• rust belts
• rust bucket
• rust buckets
• rust-coloured
• rusted
• rust fungi
• rust fungus
• rustic
• rustical
• rustically
• rusticate
• rusticated
• rusticates
• rusticating
• rustication
• rustications
• rusticator