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 List of 12-letter words containing Click to add a seventh letter
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 There are 2 twelve-letter words containing OHYDRO| GEOHYDROLOGY | • geohydrology n. (Geology) hydrogeology. • GEOHYDROLOGY n. a science that deals with the character, source, and mode of occurrence of underground water. |  | MONOHYDROGEN | • monohydrogen n. (Chemistry, in combination) A single hydrogen atom in a compound. • MONOHYDROGEN adj. designating compounds containing one hydrogen atom or ion for each combining radical or ion, e.g. disodium monohydrogen orthophosphate. |  
 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: 10 words
 - Scrabble in French: no word
 - Scrabble in Spanish: no word
 - Scrabble in Italian: no word
 - Scrabble in German: no word
 - Scrabble in Romanian: no word
 
 
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