1. Something or someone that makes or investigates tunnels
   "He is a member of the engineers, a tunneller who worked on the construction of the London Underground"
   - tunneler [US]

Derived forms: tunnellers

• supernatant
• supernatural
• supernatural being
• supernatural virtue
• supernaturalism
• supernaturalist
• supernaturalistic
• supernaturally
• supernaturalness
• supernormal
• supernova
• supernumerary
• superorder
• superorder Acanthopterygii
• superorder Labyrinthodonta
• superorder Labyrinthodontia
• superorder Malacopterygii
• superorder Ratitae
• superordinate
• superordinate word
• superordination
• superoxide
• superoxide anion
• superoxide dismutase
• superpatriotic