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 There are 7 thirteen-letter words containing B, 2I, 2O and 3S| BASIDIOSPORES | • basidiospores n. Plural of basidiospore. • BASIDIOSPORE n. a spore produced by a basidium.
 |  | ENDOSYMBIOSIS | • endosymbiosis n. (Ecology) The condition of living within the body or cells of another organism; an instance of an organism so living. • ENDOSYMBIOSIS n. symbiosis in which one of the symbiotic organisms lives inside the other.
 |  | OBLIVIOUSNESS | • obliviousness n. The characteristic of being oblivious. • OBLIVIOUS n. forgetful.
 |  | OBSESSIONISTS | • obsessionists n. Plural of obsessionist. • OBSESSIONIST n. someone who is obsessed by a fixed idea.
 |  | OSTEOFIBROSIS | • osteofibrosis n. Fibrotic osteodystrophy. • OSTEOFIBROSIS n. fibrosis of the bone.
 |  | SNOWMOBILISTS | • snowmobilists n. Plural of snowmobilist. • SNOWMOBILIST n. one who engages in the sport of snowmobiling.
 |  | SUBCOMMISSION | • subcommission n. A subdivision of a commission. • SUBCOMMISSION v. to give a subsidiary commission.
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 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.Definitions are short excerpt from the WikWik.org and 1Word.ws.
 
 See this list for:English Wiktionary: 21 wordsScrabble in French: 39 wordsScrabble in Spanish: 9 wordsScrabble in Italian: 34 wordsScrabble in German: no wordScrabble in Romanian: 4 words
 
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