List of 15-letter words beginning with

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There are 5 fifteen-letter words beginning with IS

ISMATICALNESSES	• ISMATICALNESS n. ISMATICAL, addicted to isms or faddish theories, also ISMATIC.
ISOIMMUNISATION	• isoimmunisation n. Alternative spelling of isoimmunization. • ISOIMMUNISATION n. the development of antibodies within an individual against antigens from another individual of the same species, also ISOIMMUNIZATION.
ISOIMMUNIZATION	• isoimmunization n. The development of antibodies in response to an isoantigen. • ISOIMMUNIZATION n. the development of antibodies within an individual against antigens from another individual of the same species, also ISOIMMUNISATION.
ISOPERIMETRICAL	• isoperimetrical adj. Isoperimetric. • ISOPERIMETRICAL adj. having equal perimeters.
ISOTHIOCYANATES	• isothiocyanates n. Plural of isothiocyanate.

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: 105 words
Scrabble in French: 6 words
Scrabble in Spanish: no word
Scrabble in Italian: 44 words
Scrabble in German: no word
Scrabble in Romanian: 13 words

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