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 There are 13 fifteen-letter words containing B, I, 2O, R, 2S and U| BIOASTRONAUTICS | • bioastronautics n. The study of the biological, behavioural and medical aspects of astronautics. • BIOASTRONAUTICS n. the science dealing with the effects of travel in space on living organisms.
 |  | CLAUSTROPHOBIAS | • claustrophobias n. Plural of claustrophobia. • CLAUSTROPHOBIA n. fear of closed spaces.
 |  | HERBIVOROUSNESS | • herbivorousness n. The state or quality of being herbivorous. • HERBIVOROUS n. eating plants.
 |  | LABORIOUSNESSES | • LABORIOUSNESS n. LABORIOUS, full of labour. |  | NEUROBIOLOGISTS | • neurobiologists n. Plural of neurobiologist. • NEUROBIOLOGIST n. one who studies neurobiology.
 |  | OBSTRUCTIONISMS | • obstructionisms n. Plural of obstructionism. • OBSTRUCTIONISM n. deliberate interference with the progress or business esp. of a legislative body.
 |  | OBSTRUCTIONISTS | • obstructionists n. Plural of obstructionist. • OBSTRUCTIONIST n. someone, esp. a politician in a legislative assembly, who practises obstruction.
 |  | OPPROBRIOUSNESS | • opprobriousness n. The state or condition of being opprobrious. • OPPROBRIOUS n. expressing contemptuous reproach; bringing disgrace.
 |  | RIBONUCLEOSIDES | • ribonucleosides n. Plural of ribonucleoside. • RIBONUCLEOSIDE n. a nucleoside containing ribose.
 |  | STROMBULIFEROUS | • STROMBULIFEROUS adj. bearing spirally coiled organs. |  | SUBCOMMISSIONER | • subcommissioner n. A lesser or subsidiary commissioner. • SUBCOMMISSIONER n. a subordinate commissioner.
 |  | SUBORGANISATION | • SUBORGANISATION n. a subsidiary part of an organisation, also SUBORGANIZATION. |  | SUBPROFESSIONAL | • subprofessional adj. Not meeting the quality standards expected of a professional. • subprofessional n. A person working at less than professional level.
 • SUBPROFESSIONAL adj. functioning or qualified to function below the professional level but distinctly above the clerical or labor level and usually under the supervision of a professionally trained person.
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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 1Word.ws and WikWik.org.
 
 See this list for:English Wiktionary: 83 wordsScrabble in French: 55 wordsScrabble in Spanish: 30 wordsScrabble in Italian: 22 wordsScrabble in German: no wordScrabble in Romanian: 11 words
 
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