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There are 12 twelve-letter words containing A, 2D, H, M and Y

DEMETHYLATEDdemethylated v. Simple past tense and past participle of demethylate.
demethylated adj. (Chemistry) That has been subjected to demethylation.
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.
FORMALDEHYDEformaldehyde n. (Organic chemistry) The simplest aldehyde, HCHO, a colourless gas that has many industrial applications;…
FORMALDEHYDE n. a formic aldehyde, formalin.
HEBDOMADALLYhebdomadally adv. In periods of seven days; weekly.
HEBDOMADAL adv. occurring, appearing, or done every seven days; weekly.
HEMIHYDRATEDhemihydrated adj. (Chemistry) In the form of a hemihydrate.
HEMIHYDRATED adj. in the form of a hemihydrate.
HYDATIDIFORMhydatidiform adj. Resembling a hydatid.
HYDATIDIFORM adj. having the shape of a hydatid, a fluid-filled cyst, esp. one containing tapeworm larva.
HYDRODYNAMIChydrodynamic adj. (Physics) Of, or relating to the science of hydrodynamics.
hydrodynamic adj. Operated by the force of water in motion.
HYDRODYNAMIC adj. of, relating to, or involving principles of hydrodynamics, also HYDRODYNAMICAL.
HYDROMEDUSAEhydromedusae n. Plural of hydromedusa.
HYDROMEDUSA n. a hydrozoan in its medusoid stage, also HYDROMEDUSAN, HYDROMEDUSOID.
HYDROMEDUSANhydromedusan adj. (Zoology) Relating to the hydromedusas.
HYDROMEDUSAN n. a hydromedusa, also HYDROMEDUSA, HYDROMEDUSOID.
HYDROMEDUSAShydromedusas n. Plural of hydromedusa.
HYDROMEDUSA n. a hydrozoan in its medusoid stage, also HYDROMEDUSAN, HYDROMEDUSOID.
METALDEHYDESMETALDEHYDE n. a polymer of acetaldehyde.
MONOHYDRATEDmonohydrated adj. Hydrated with a single molecule of water.
MONOHYDRATED adj. like a monohydrate.

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: 35 words
  • Scrabble in French: 2 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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