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 There are 3 eleven-letter words containing OPON| HYDROPONICS | • hydroponics n. The cultivation of plants in a nutrient solution rather than in the soil. • HYDROPONICS n. the practice of growing plants in a chemical solution without soil. |  | TOPONYMICAL | • toponymical adj. Toponymic. • TOPONYMICAL adj. related to toponymy, the study of place-names, also TOPONYMAL, TOPONYMIC. |  | TOPONYMISTS | • toponymists n. Plural of toponymist. • TOPONYMIST n. one who studies toponymy, the study of place-names. |  
 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. 
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