horn·tail 
(hôrntāl′)
(hôrntāl′)n.
Any of various sawflies of the family Siricidae, having a spine at the end of the abdomen and, in the female, a long stout ovipositor.
- superficial
- superficiality
- superficially
- superficialness
- superficies
- superfine
- superfineness
- superfluid
- superfluidity
- superfluity
- superfluous
- superfluously
- superfluousness
- super flyweight
- super G
- supergalaxy
- supergene
- supergiant
- super giant slalom
- supergraphics
- supergravity
- supergun
- superheat
- superheater
- superhelical