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There are 8 twelve-letter words containing D, H, I, 2O, 2R and Y

BOROHYDRIDESborohydrides n. Plural of borohydride.
BOROHYDRIDE n. a compound of boron and hydrogen, used as a reducing agent.
CHLOROHYDRINchlorohydrin n. (Organic chemistry) Any halohydrin in which the halogen is chlorine.
CHLOROHYDRIN n. any of various organic compounds derived from diols or polyhydroxy alcohols by substitution of chlorine for part of the hydroxyl groups.
HYDROCHLORIChydrochloric adj. (Chemistry) Of or relating to hydrochloric acid.
HYDROCHLORIC adj. applied to an acid composed of hydrogen and chlorine, hydrogen chloride, still sometimes called muriatic acid.
HYDROFLUORIChydrofluoric adj. (Chemistry) Containing hydrogen and fluorine.
HYDROFLUORIC adj. as in hydrofluoric acid, a strong acid used for etching glass.
HYDROFORMINGhydroforming n. (Engineering) A cost-effective way of shaping malleable metals into lightweight, stiff pieces by means…
hydroforming n. (Organic chemistry) The reaction of petroleum with hydrogen.
HYDROFORMING n. the catalytic reforming of petroleum to increase the proportion of aromatic and branched-chain hydrocarbons.
HYDROMORPHIChydromorphic adj. Synonym of hydric (“requiring moisture”).
hydromorphic adj. (Soil science) Formed in the presence of an excess of water.
HYDROMORPHIC adj. developed in the presence of an excess of moisture which tends to suppress aerobic factors in soil-building.
HYDROTROPISMhydrotropism n. (Biology) The movement of a plant (or other organism) in response to water, either towards or away from water.
HYDROTROPISM n. growth in the direction of water.
PYRITOHEDRONpyritohedron n. (Mathematics) An irregular dodecahedron, the faces of which are identical but irregular pentagons.
pyritohedron n. (Mineralogy) The shape of one of the crystal habits of pyrite.
PYRITOHEDRON n. a pentagonal dodecahedron.

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: 36 words
  • Scrabble in French: 2 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 1 word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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