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There are 4 seven-letter words beginning with THIO

THIOLIC	• thiolic adj. (Organic chemistry) Of or pertaining to a thiol. • THIOLIC adj. relating to thiol, a chemical compound, mercaptan.
THIONIC	• thionic adj. Of or pertaining to sulfur. • THIONIC adj. pertaining to or containing sulphur, as in thionic acid.
THIONIN	• thionin n. Alternative form of thionine. • thionin n. (Biochemistry) Any of a class of cytotoxic polypeptides found in some plants. • THIONIN n. a violet dye, also THIONINE.
THIONYL	• thionyl n. (Chemistry) The divalent radical O=S<… • THIONYL n. a compound containing the group -SO.

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: 10 words
Scrabble in French: no word
Scrabble in Spanish: no word
Scrabble in Italian: no word
Scrabble in German: no word
Scrabble in Romanian: no word

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