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 List of 8-letter words containing Click to add a fifth letter
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 There are 6 eight-letter words containing SOID| CISSOIDS | • cissoids n. Plural of cissoid. • CISSOID n. a type of geometric curve. |  | EMULSOID | • emulsoid n. A colloid solution consisting of a suspension of liquid particles in a liquid. • EMULSOID n. a liquid dispersed in another liquid. |  | MEDUSOID | • medusoid n. Jellyfish. • medusoid adj. Having the shape of a jellyfish. • MEDUSOID n. a jellyfish, also MEDUSA, MEDUSAN. |  | SINUSOID | • sinusoid n. (Mathematics) A curve having the shape of a sine wave. • sinusoid n. (Anatomy) Any of several channels through which venous blood passes in various organs. • sinusoid adj. (Mathematics) sinusoidal. |  | THYRSOID | • thyrsoid adj. Having the approximate form of a thyrsus. • thyrsoid n. (Botany) Synonym of thyrse. • THYRSOID adj. having the form of a thyrsus, also THYRSOIDAL. |  | VIRUSOID | • virusoid n. A circular single-stranded RNA, similar but not identical to a viroid, dependent on plant viruses for… • VIRUSOID n. a particle of RNA associated with some plant viruses. |  
 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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