List of 12-letter words containing

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There are 10 twelve-letter words containing EIO

DEIONISATION	• deionisation n. (Chemistry) Alternative spelling of deionization. • DEIONISATION n. the process of deionising, also DEIONIZATION.
DEIONIZATION	• deionization n. (Chemistry) The use of ion exchange to remove ionic substances from a solution. • deionization n. (Chemistry) The return of an ionized gas to its neutral state. • DEIONIZATION n. the process of deionizing, also DEIONISATION.
LEIOTRICHIES	• LEIOTRICHY n. the state of being straight-haired.
LEIOTRICHOUS	• leiotrichous adj. Having smooth hair. • LEIOTRICHOUS adj. straight-haired.
PLEIOCHASIUM	• pleiochasium n. (Botany) An inflorescence in which several buds come out at the same time. • PLEIOCHASIUM n. a cymose inflorescence in which each branch bears more than two lateral branches.
PLEIOTROPIES	• pleiotropies n. Plural of pleiotropy. • PLEIOTROPY n. the property of having an effect simultaneously on more than one characteristic of the offspring.
PLEIOTROPISM	• pleiotropism n. (Genetics) pleiotropy. • PLEIOTROPISM n. the state of being pleiotropic, having an effect simultaneously on more than one character in the offspring.
SEMEIOLOGIES	• semeiologies n. Plural of semeiology. • SEMEIOLOGY n. the study of signs and signals, also SEMIOLOGY.
SEMEIOLOGIST	• semeiologist n. Alternative form of semiologist. • SEMEIOLOGIST n. a specialist in semeiology.
SEMEIOTICIAN	• semeiotician n. Alternative spelling of semiotician. • SEMEIOTICIAN n. a practitioner of semiotics, a philosophical theory of signs and symbols, also SEMIOTICIAN, SEMIOTICIST.

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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English Wiktionary: 37 words
Scrabble in French: 4 words
Scrabble in Spanish: no word
Scrabble in Italian: 23 words
Scrabble in German: no word
Scrabble in Romanian: 25 words

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