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There are 16 thirteen-letter words containing H, M, N, 2O, 2R and S

ADRENOCHROMESadrenochromes n. Plural of adrenochrome.
ADRENOCHROME n. a mixture of quinones.
CHROMOCENTERSchromocenters n. Plural of chromocenter.
CHROMOCENTER n. a densely staining aggregation of heterochromatic regions in the nucleus of some cells, also CHROMOCENTRE.
CHROMOCENTRESchromocentres n. Plural of chromocentre.
CHROMOCENTRE n. a densely staining aggregation of heterochromatic regions in the nucleus of some cells, also CHROMOCENTER.
CHRONOMETRIESchronometries n. Plural of chronometry.
CHRONOMETRY n. the measuring of time.
DYSMENORRHOEAdysmenorrhoea n. Alternative spelling of dysmenorrhea.
dysmenorrhœa n. Obsolete form of dysmenorrhea.
DYSMENORRHOEA n. painful menstruation, also DYSMENORRHEA.
HARMONICHORDSharmonichords n. Plural of harmonichord.
HARMONICHORD n. a keyboard instrument of violin tone, in which the strings are rubbed by rosined wheels.
HARMONOGRAPHSharmonographs n. Plural of harmonograph.
HARMONOGRAPH n. an instrument for drawing curves representing vibrations.
HARMONOMETERSharmonometers n. Plural of harmonometer.
HARMONOMETER n. an instrument for measuring the harmonic relations of sounds.
HYDROFORMINGSHYDROFORMING n. the catalytic reforming of petroleum to increase the proportion of aromatic and branched-chain hydrocarbons.
NEUROHORMONESneurohormones n. Plural of neurohormone.
NEUROHORMONE n. a hormone (as acetylcholine or norepinephrine) produced by or acting on nervous tissue.
NORMOTHERMIASNORMOTHERMIA n. normal body temperature.
ORNITHOMORPHSornithomorphs n. Plural of ornithomorph.
ORNITHOMORPH n. a figure or design in the form of a bird.
PARATHORMONESparathormones n. Plural of parathormone.
PARATHORMONE n. a parathyroid hormone.
PROMONARCHISTpromonarchist adj. In favour of monarchism.
promonarchist n. A supporter of monarchism.
PROMONARCHIST adj. in favour of monarchy.
RHINOSCLEROMArhinoscleroma n. (Medicine) A rare skin disease with very hard, more or less flattened, prominences, appearing first…
RHINOSCLEROMA n. a disease with hard swelling in the nose etc.
RHOMBOHEDRONSrhombohedrons n. Plural of rhombohedron.
RHOMBOHEDRON n. a parallelepiped whose faces are rhombuses.

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: 60 words
  • Scrabble in French: 24 words
  • Scrabble in Spanish: 33 words
  • Scrabble in Italian: 7 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 8 words


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