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 There are 9 twelve-letter words containing OSYN| BIOSYNTHESES | • biosyntheses n. Plural of biosynthesis. • BIOSYNTHESIS n. the production of a chemical compound by a living organism. |  | BIOSYNTHESIS | • biosynthesis n. (Biochemistry) The synthesis of organic compounds within a living organism, especially the synthesis… • BIOSYNTHESIS n. the production of a chemical compound by a living organism. |  | BIOSYNTHETIC | • biosynthetic adj. (Biochemistry) of or pertaining to biosynthesis. • BIOSYNTHETIC adj. relating to biosynthesis. |  | ELEEMOSYNARY | • eleemosynary adj. Relating to charity, alms, or almsgiving. • eleemosynary adj. Given in charity or alms; having the nature of alms. • eleemosynary adj. Supported by charity. |  | GEOSYNCLINAL | • geosynclinal adj. (Geology) Of the Earth’s crust, bending downward or subsiding and permitting the gradual accumulation of sediment. • geosynclinal n. (Geology) The downward bend or subsidence of the Earth’s crust, which permits the gradual accumulation… • GEOSYNCLINAL adj. of or like a geosyncline. |  | GEOSYNCLINES | • geosynclines n. Plural of geosyncline. • GEOSYNCLINE n. a down-warping of the Earth's crust. |  | IDIOSYNCRASY | • idiosyncrasy n. A behavior or way of thinking that is characteristic of a person. • idiosyncrasy n. A language or behaviour that is particular to an individual or group. • idiosyncrasy n. (Medicine) A peculiar individual reaction to a generally innocuous substance or factor. |  | MONOSYNAPTIC | • monosynaptic adj. (Neuroanatomy) Having, or involving a single synapse. • monosynaptic adj. (Derogatory) Stupid, lacking in brainpower. • MONOSYNAPTIC adj. having or involving a single neural synapse. |  | MORPHOSYNTAX | • morphosyntax n. (Linguistics) Morphology and syntax regarded as an interlinked unit. • morpho-syntax n. (Linguistics) The system of the internal structure of words (morphology) and the way in which words… • morpho-syntax n. (Linguistics, formal) Grammar. |  
 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: 38 words
 - Scrabble in French: 4 words
 - Scrabble in Spanish: no word
 - Scrabble in Italian: no word
 - Scrabble in German: no word
 - Scrabble in Romanian: no word
 
 
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