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There are 20 thirteen-letter words containing D, H, I, N, O, R, S and Y

ANTIHYDROGENSantihydrogens n. Plural of antihydrogen.
ANTIHYDROGEN n. an antimatter form of hydrogen.
CHIMNEYBOARDSCHIMNEYBOARD n. a board blocking up a fireplace.
CHLOROHYDRINSchlorohydrins n. Plural of chlorohydrin.
CHLOROHYDRIN n. any of various organic compounds derived from diols or polyhydroxy alcohols by substitution of chlorine for part of the hydroxyl groups.
DEHYDROGENISEdehydrogenise v. Alternative spelling of dehydrogenize.
DEHYDROGENISE v. to remove hydrogen from, also DEHYDROGENIZE.
DISHONOURABLYdishonourably adv. (Britain) Alternative spelling of dishonorably.
DISHONOURABLE adv. not honourable, also DISHONORABLE.
DISINHIBITORYdisinhibitory adj. That disinhibits.
disinhibitory adj. Of, or relating to a disinhibitor.
DISINHIBITORY adj. serving to disinhibit.
DYSMENORRHEICdysmenorrheic adj. Of, pertaining to, or experiencing dysmenorrhea.
DYSMENORRHEIC adj. relating to dysmenorrhea, also DYSMENORRHOEIC.
HYALURONIDASEhyaluronidase n. (Biochemistry) Any enzyme that catalyses the hydrolysis of hyaluronic acid.
HYALURONIDASE n. a mucolytic enzyme that facilitates the spread of fluids through tissues by lowering the viscosity of hyaluronic acid.
HYBRIDISATIONhybridisation n. Alternative form of hybridization.
HYBRIDISATION n. the process of hybridising, also HYBRIDIZATION.
HYDRODYNAMICShydrodynamics n. (Physics) The scientific study of fluids in motion.
HYDRODYNAMICS n. the study of movement in liquids, also HYDROMECHANICS.
HYDROFORMINGSHYDROFORMING n. the catalytic reforming of petroleum to increase the proportion of aromatic and branched-chain hydrocarbons.
HYDROGENISINGhydrogenising v. Present participle of hydrogenise.
HYDROGENISE v. to hydrogenate, also HYDROGENIZE.
HYDROKINETICShydrokinetics n. (Physics) The branch of physics concerned with the movement of fluids.
HYDROKINETICS n. the study of the motion of fluids.
HYDROLYSATIONhydrolysation n. Alternative form of hydrolyzation.
HYDROLYSATION n. the process of hydrolysing, also HYDROLYZATION.
HYDROQUINONEShydroquinones n. Plural of hydroquinone.
HYDROQUINONE n. another name for quinol.
HYDROZINCITEShydrozincites n. Plural of hydrozincite.
HYDROZINCITE n. a monoclinic basic carbonate of zinc that is a secondary mineral occurring as light-coloured crusts on zinc deposits.
HYPOCHONDRIAShypochondrias n. Plural of hypochondria.
HYPOCHONDRIA n. suffering from imaginary illness.
PYRITOHEDRONSpyritohedrons n. Plural of pyritohedron.
PYRITOHEDRON n. a pentagonal dodecahedron.
SYNARTHRODIALsynarthrodial adj. Relating to synarthrosis.
SYNARTHRODIAL adj. of, relating to, or being a synarthrosis.
SYNCHONDROSISsynchondrosis n. (Anatomy) A form of only slightly-moveable articulation between bones joined by hyaline cartilage, as…
SYNCHONDROSIS n. synarthrosis in which the bone surfaces are connected by cartilage.

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 1Word.ws and WikWik.org.

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See this list for:

  • English Wiktionary: 126 words
  • Scrabble in French: 17 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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