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There are 20 fifteen-letter words containing A, H, M, 2O, R, T and Y

ARCHEOASTRONOMYarcheoastronomy n. Alternative spelling of archaeastronomy.
ARCHEOASTRONOMY n. the scientific study of the beliefs and practices concerning astronomy that existed in ancient and prehistoric civilizations.
AUTOMORPHICALLYautomorphically adv. (Mathematics) In terms of automorphisms.
AUTOMORPHIC adv. formed after its or one's own pattern.
CHEMOAUTOTROPHYchemoautotrophy n. (Biology) A mode of growth in which CO2 is the exclusive source of assimilated carbon, and energy is…
CHEMOAUTOTROPHY n. the production of energy by the oxidation of inorganic compounds, such as iron, ammonia and hydrogen sulphide.
CHEMOTROPICALLYchemotropically adv. In a chemotropic manner.
CHEMOTROPIC adv. exhibiting chemotropism, i.e. plant growth in the direction of a particular chemical.
DERMATOPHYTOSESdermatophytoses n. Plural of dermatophytosis.
DERMATOPHYTOSIS n. a fungal infection of the skin, esp. the feet.
DERMATOPHYTOSISdermatophytosis n. (Medicine) A fungal infection of the skin caused by a dermatophyte, ringworm.
DERMATOPHYTOSIS n. a fungal infection of the skin, esp. the feet.
ECTOMYCORRHIZAEectomycorrhizae n. Plural of ectomycorrhiza.
ECTOMYCORRHIZA n. a type of mycorrhiza in which the fungus forms a layer on the outside of the roots of the plant.
ECTOMYCORRHIZASectomycorrhizas n. Plural of ectomycorrhiza.
ECTOMYCORRHIZA n. a type of mycorrhiza in which the fungus forms a layer on the outside of the roots of the plant.
ELECTROMYOGRAPHelectromyograph n. A device used in electromyography to generate electromyograms.
ELECTROMYOGRAPH n. an instrument for diagnosing neuromuscular disorders.
HAEMOCYTOMETERShaemocytometers n. Plural of haemocytometer.
HAEMOCYTOMETER n. an apparatus for counting the number of cells in a quantity of blood, typically consisting of a graduated pipette for drawing and diluting, also HEMOCYTOMETER.
HEMATOPORPHYRINhematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom).
HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins.
HOMOCENTRICALLYHOMOCENTRIC adv. having the same central or focal point.
HYETOMETROGRAPHHYETOMETROGRAPH n. an instrument for recording rainfall.
LYMPHOSARCOMATAlymphosarcomata n. Plural of lymphosarcoma.
LYMPHOSARCOMA n. a tumour of the lymph glands.
NORTHCOUNTRYMANnorth␣countryman n. Someone from the north of England.
NORTHCOUNTRYMAN n. one living in the north.
PHOTOMETRICALLYphotometrically adv. In a photometric manner.
photometrically adv. By using photometry.
PHOTOMETRIC adv. of or relating to photometry or the photometer.
POLYCHROMATISMSPOLYCHROMATISM n. being multicoloured.
PROSENCHYMATOUSprosenchymatous adj. Relating to the prosenchyma.
PROSENCHYMATOUS adj. relating to prosenchyma, supporting plant tissue containing little protoplasm.
STREPHOSYMBOLIAstrephosymbolia n. A tendency, associated with word blindness, to twist or invert certain similar letters (such as b and d) when reading.
STREPHOSYMBOLIA n. a visual disorder where letters are seen mirror imaged.
SYMMETROPHOBIASSYMMETROPHOBIA n. fear of symmetry.

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: 225 words
  • Scrabble in French: 5 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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