List of 15-letter words containing •••••••

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There are 15 fifteen-letter words containing I, N, O, S, 3T and Y

COINSTANTANEITY	• coinstantaneity n. Coinstantaneousness. • COINSTANTANEITY n. the state of being coinstantaneous.
CYTOGENETICISTS	• cytogeneticists n. Plural of cytogeneticist. • CYTOGENETICIST n. one who studies cytogenetics.
CYTOTAXONOMISTS	• cytotaxonomists n. Plural of cytotaxonomist. • CYTOTAXONOMIST n. a practitioner of cytotaxonomy.
HYPOSTATISATION	• HYPOSTATISATION n. the process of hypostatising, also HYPOSTATIZATION.
HYPOSTATIZATION	• hypostatization n. The act or process of being hypostatized. • HYPOSTATIZATION n. the act of hypostatizing, also HYPOSTATISATION.
INSTITUTIONALLY	• institutionally adv. In an institutional manner. • institutionally adv. Throughout an institution. • INSTITUTIONAL adv. of or relating to an institution, also INSTITUTIONARY.
LITHONTHRYPTICS	• lithonthryptics n. Plural of lithonthryptic. • LITHONTHRYPTIC n. a medicine for dissolving kidney stones, also LITHONTRIPTIC, LITHOTRIPTIC.
SUBSTITUTIONARY	• substitutionary adj. Of or relating to substitution or replacement. • SUBSTITUTIONARY adj. relating to substitution.
SYNTHETISATIONS	• SYNTHETISATION n. the process of synthetising, also SYNTHETIZATION.
SYNTHETIZATIONS	• synthetizations n. Plural of synthetization. • SYNTHETIZATION n. the process of synthetizing, also SYNTHETISATION.
SYSTEMATISATION	• systematisation n. (British spelling) Alternative form of systematization. • SYSTEMATISATION n. the act of systematising, also SYSTEMATIZATION.
SYSTEMATIZATION	• systematization n. The act of systematizing. • systematization n. A systematic organization. • SYSTEMATIZATION n. the act of systematizing, also SYSTEMATISATION.
THIRTYSOMETHING	• thirtysomething n. A tricenarian: a person in their thirties, a person aged between 30 and 39 years (inclusive). • thirtysomething adj. Between 30 and 39 years of age. • thirtysomething adj. Between 30 and 39 in number.
TWENTYSOMETHING	• twentysomething n. A person whose age is between twenty and twenty-nine years, inclusive; someone in their twenties. • twentysomething num. Between twenty and thirty. • twenty-something num. Alternative form of twentysomething.
UNTRUSTWORTHILY	• untrustworthily adv. In an untrustworthy manner. • UNTRUSTWORTHY adv. not trustworthy.

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: 66 words
Scrabble in French: 3 words
Scrabble in Spanish: 1 word
Scrabble in Italian: no word
Scrabble in German: no word
Scrabble in Romanian: no word

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