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There are 5 eleven-letter words beginning with HYDROGEN

HYDROGENASE	• hydrogenase n. (Biochemistry) Any enzyme that catalyzes the reduction of a substrate by the reversible oxidation of hydrogen. • HYDROGENASE n. an enzyme that catalyzes hydrogen formation in certain microorganisms.
HYDROGENATE	• hydrogenate v. (Chemistry, transitive) to treat something, or react something, with hydrogen; especially to react an… • HYDROGENATE v. to combine or treat with hydrogen.
HYDROGENISE	• hydrogenise v. (Transitive, British spelling, dated) Alternative spelling of hydrogenize. • HYDROGENISE v. to hydrogenate, also HYDROGENIZE.
HYDROGENIZE	• hydrogenize v. (Transitive, chemistry, dated) to hydrogenate. • HYDROGENIZE v. to hydrogenate, also HYDROGENISE.
HYDROGENOUS	• hydrogenous adj. Of, related to, or containing hydrogen. • HYDROGENOUS adj. containing hydrogen.

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.

See this list for:

English Wiktionary: 13 words
Scrabble in French: 8 words
Scrabble in Spanish: no word
Scrabble in Italian: no word
Scrabble in German: no word
Scrabble in Romanian: no word

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