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10-letter words (27 found)
SANATORIUM,SANITARIUM,SANITORIUM,SCLEROTIUM,SEABORGIUM,SEAQUARIUM,SEPTENNIUM,SEQUESTRUM,SESTERTIUM,SIMILLIMUM,SIMULACRUM,SPARGANIUM,SPERMARIUM,SPERMATIUM,SPIRACULUM,SPORANGIUM,STICHIDIUM,STOMODAEUM,STRAMONIUM,STUMBLEBUM,SUBOPTIMUM,SUBSELLIUM,SUBSTRATUM,SUDATORIUM,SULPHONIUM,SURROGATUM,SYNANDRIUM,
You can make 27 10-letter words starting with s and ending with um according to the Scrabble US and Canada dictionary.