doppelgänger /dopˈl-gengˈər/ or doppelganger /-gangˈ/

1. A ghostly double of a human person, an apparition
2. A wraith

• thermal neutron
• thermal neutrons
• thermal noise
• thermal noises
• thermal printer
• thermal printers
• thermal reactor
• thermal reactors
• thermals
• thermal shock
• thermal shocks
• thermal signature
• thermal signatures
• thermal springs
• -thermic
• thermic
• thermical
• thermically
• thermic lance
• thermic lances
• Thermidor
• Thermidorian
• Thermidors
• thermion
• thermionic