Clear this solution

Deer
Dees
Desert
Deter
Dree
Drest
Erred
Erse
Erst
Ester
Rede
Reds
Reed
Reset
Rest
Rete
Rets
Seder
Seed
Seer
Sere
Steed
Steer
Stere
Tees
Terr
Terse
Tree
Treed
Trees