List of 12-letter words containing

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There are 20 twelve-letter words containing THAN

DIAZOMETHANE	• diazomethane n. (Organic chemistry) the simplest diazo compound, CH₂=N⁺=N^-; a toxic, yellow, explosive gas; used in… • DIAZOMETHANE n. a yellow odourless explosive gas, used as a methylating agent.
ETHANOLAMINE	• ethanolamine n. (Chemistry) a hydroxy-amine, HO.CH₂.CH₂.NH₂, manufactured by the reaction of ethylene oxide with ammonia;… • ETHANOLAMINE n. a colorless liquid amino alcohol used esp. as a solvent in the synthesis of detergents and in gas purification.
ETHOXYETHANE	• ethoxyethane n. (Organic chemistry, systematic name) diethyl ether. • ETHOXYETHANE n. a type of ether, aka diethyl ether, an isomer of butanol.
EUTHANASIAST	• EUTHANASIAST n. a supporter of euthanasia.
EUTHANATISED	• euthanatised v. Simple past tense and past participle of euthanatise. • EUTHANATISE v. to perform euthanasia on, also EUTHANATIZE, EUTHANISE, EUTHANIZE.
EUTHANATISES	• euthanatises v. Third-person singular simple present indicative form of euthanatise. • EUTHANATISE v. to perform euthanasia on, also EUTHANATIZE, EUTHANISE, EUTHANIZE.
EUTHANATIZED	• euthanatized v. Simple past tense and past participle of euthanatize. • EUTHANATIZE v. to perform euthanasia on, also EUTHANATISE, EUTHANISE, EUTHANIZE.
EUTHANATIZES	• euthanatizes v. Third-person singular simple present indicative form of euthanatize. • EUTHANATIZE v. to perform euthanasia on, also EUTHANATISE, EUTHANISE, EUTHANIZE.
METHANAMIDES	• methanamides n. Plural of methanamide. • METHANAMIDE n. an amide derived from formic acid, aka formamide.
METHANATIONS	• methanations n. Plural of methanation. • METHANATION n. the production of methane esp. from carbon monoxide and hydrogen.
METHANOMETER	• methanometer n. An instrument, resembling a eudiometer, used to detect the presence and amount of methane, as in coal mines. • METHANOMETER n. instrument for detecting presence of methane.
NITROMETHANE	• nitromethane n. A colourless oily liquid used in organic synthesis, and as a fuel for rockets, racing cars and model aircraft. • nitromethane n. (Chemistry) the simplest nitroparaffin, CH₃NO₂. • NITROMETHANE n. a liquid nitroparaffin used as an industrial solvent and as a fuel for rockets and high-performance engines.
POLYURETHANE	• polyurethane n. (Organic chemistry) Any of various polymeric resins containing urethane links; used in very many industrial… • POLYURETHANE n. any of various polymers used esp. in flexible and rigid foams, elastomers, and resins, also POLYURETHAN.
POLYURETHANS	• POLYURETHAN n. any of various polymers used esp. in flexible and rigid foams, elastomers, and resins, also POLYURETHANE.
THANKFULLEST	• thankfullest adj. Superlative form of thankful: most thankful. • THANKFUL adj. grateful.
THANKFULNESS	• thankfulness n. The state of being thankful. • THANKFULNESS n. the state of being thankful.
THANKSGIVERS	• thanksgivers n. Plural of thanksgiver. • THANKSGIVER n. one who gives thanks.
THANKSGIVING	• thanksgiving n. An expression of gratitude. • thanksgiving n. A short prayer said at meals; grace, a benediction. • thanksgiving n. A public celebration in acknowledgement of divine favour.
TRANSLEITHAN	• Transleithan adj. Beyond the Leitha, the boundary river between Austria and Hungary. • TRANSLEITHAN adj. beyond the river Leitha, once in part the boundary between Austria and Hungary; hence, Hungarian.
UNTHANKFULLY	• unthankfully adv. In an unthankful way; ungratefully. • UNTHANKFUL adv. not thankful.

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: 117 words
Scrabble in French: 25 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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