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There are 16 twelve-letter words containing A, D, 2E, H, L, T and Y

ACETALDEHYDEacetaldehyde n. (Organic chemistry) An organic compound, (CH3CHO). Sometimes called ethanal or acetic aldehyde. See…
ACETALDEHYDE n. a chemical compound.
BIGHEARTEDLYbigheartedly adv. In a bighearted manner.
big-heartedly adv. Alternative form of bigheartedly.
BIGHEARTED adv. generous, charitable.
BREATHALYSEDbreathalysed v. Simple past tense and past participle of breathalyse, an alternative spelling of breathalyze.
BREATHALYSE v. to use a device which measures the amount of alcohol on a person's breath, also BREATHALYZE.
BREATHALYZEDbreathalyzed v. Simple past tense and past participle of breathalyze.
BREATHALYZE v. to use a device which measures the amount of alcohol on a person's breath, also BREATHALYSE.
DEMETHYLATEDdemethylated v. Simple past tense and past participle of demethylate.
demethylated adj. (Chemistry) That has been subjected to demethylation.
DEMETHYLATESdemethylates v. Third-person singular simple present indicative form of demethylate.
DIETHYLAMIDEdiethylamide n. (Organic chemistry) The derivative of a compound formed by adding an amide group with two ethyl substituents…
DIETHYLAMIDE n. as in lysergic acid diethylamide, LSD.
DIETHYLAMINEdiethylamine n. (Organic chemistry) The secondary amine (CH3CH2)2NH.
DIETHYLAMINE n. a liquid resembling ethylamine, derived from ammonia, with ethyl groups replacing two hydrogen atoms.
HEADMASTERLYheadmasterly adj. In a manner befitting a headmaster.
HEADMASTERLY adj. like a headmaster.
HEREDITARILYhereditarily adv. In a hereditary manner.
hereditarily adv. With regard to inheritance.
HEREDITARY adv. genetically transmitted or transmittable from parent to offspring.
HETERODACTYLheterodactyl adj. (Zoology) heterodactylous.
HETERODACTYL n. a heterodactylous bird.
MEALYMOUTHEDmealymouthed adj. Alternative form of mealy-mouthed.
mealy-mouthed adj. Prone to speaking evasively, indirectly, or duplicitously; not forthright.
MEALYMOUTHED adj. not plain and straightforward.
METALDEHYDESMETALDEHYDE n. a polymer of acetaldehyde.
REHYDRATABLErehydratable adj. Capable of being rehydrated.
REHYDRATABLE adj. capable of being rehydrated.
SOFTHEADEDLYsoftheadedly adv. In a softheaded manner.
SOFTHEADED adv. having or indicative of a weak, unrealistic, or uncritical mind.
SYNADELPHITEsynadelphite n. (Mineralogy) An orthorhombic-dipyramidal mineral containing arsenic, calcium, hydrogen, lead, magnesium…
SYNADELPHITE n. a manganese aluminium arsenate.

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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See this list for:

  • English Wiktionary: 72 words
  • Scrabble in French: 3 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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