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There are 20 twelve-letter words containing A, D, H, M, T and Y

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.
DERMATOPHYTEdermatophyte n. Any parasitic fungus (mycosis) that infects the skin (tinea, ringworm, jock itch, athlete’s foot).
DERMATOPHYTE n. a fungus parasitic on the skin or skin derivatives (as hair or nails).
DIATHERMANCYdiathermancy n. The condition of being diathermic.
DIATHERMANCY n. permeability by or conductibility of radiant heat, also DIATHERMACY.
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.
DITHYRAMBISTDITHYRAMBIST n. one who sings dithyrambic hymns.
DYSRHYTHMIASdysrhythmias n. Plural of dysrhythmia, which can refer to types of dysrhythmia, cases of dysrhythmia, or episodes of dysrhythmia.
DYSRHYTHMIA n. an abnormal rhythm.
HEADMASTERLYheadmasterly adj. In a manner befitting a headmaster.
HEADMASTERLY adj. like a headmaster.
HEMIHYDRATEDhemihydrated adj. (Chemistry) In the form of a hemihydrate.
HEMIHYDRATED adj. in the form of a hemihydrate.
HEMIHYDRATEShemihydrates n. Plural of hemihydrate.
HEMIHYDRATE n. a hydrate, such as plaster of paris, containing half a mole of water to one mole of the compound forming the hydrate.
HYDATIDIFORMhydatidiform adj. Resembling a hydatid.
HYDATIDIFORM adj. having the shape of a hydatid, a fluid-filled cyst, esp. one containing tapeworm larva.
HYDROTHERMALhydrothermal adj. Of, or relating to hot water.
hydrothermal adj. (Geology) Of or relating to emanations of hot water that are rich in minerals, or to the rocks formed from them.
HYDROTHERMAL adj. designating naturally hot underground water that has geological effects.
LYMPHOMATOIDlymphomatoid adj. Relating to, or characteristic of lymphomata.
LYMPHOMATOID adj. like a lymphoma.
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.
METHODICALLYmethodically adv. In a methodical manner; with order.
METHODICAL adv. arranged, characterized by, or performed with method or order, also METHODIC.
MONOHYDRATEDmonohydrated adj. Hydrated with a single molecule of water.
MONOHYDRATED adj. like a monohydrate.
MONOHYDRATESmonohydrates n. Plural of monohydrate.
MONOHYDRATE n. a hydrate containing one molecule of water per molecule of the compound.
PHOTODYNAMICphotodynamic adj. Of, relating to, or caused by the energy or momentum of light or other electromagnetic radiations.
photodynamic adj. Of, or relating to photodynamics.
PHOTODYNAMIC adj. of, relating to, or having the property of intensifying or inducing a toxic reaction to light (as in the destruction of cancer cells stained with a light-sensitive dye) in a living system.

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: 110 words
  • Scrabble in French: 10 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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