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There are 18 fifteen-letter words containing C, H, M, 2O, S, 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.
BIOGEOCHEMISTRYbiogeochemistry n. (Biology, geology, chemistry, ecology) The scientific study of biological, geological and chemical processes…
BIOGEOCHEMISTRY n. the science of plants and animals in relation to chemicals in the soil.
CHOLECYSTECTOMYcholecystectomy n. (Surgery) The surgical procedure to remove the gall bladder.
CHOLECYSTECTOMY n. a surgical operation to remove the gall bladder.
CHOLECYSTOSTOMYcholecystostomy n. The surgical creation of a stoma in the gallbladder, which can facilitate placement of a tube for drainage.
CHOLECYSTOSTOMY n. the surgical formation of an opening in the wall of the gall bladder, also CHOLECYSTOTOMY.
COLLENCHYMATOUScollenchymatous adj. Relating to collenchyma.
COLLENCHYMATOUS adj. relating to collenchyma.
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.
ETHNOMUSICOLOGYethnomusicology n. (Music) The study of music and culture; the study of music as it relates to its cultural context.
ETHNOMUSICOLOGY n. the study of comparative musical systems.
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.
HOMOPLASTICALLYhomoplastically adv. In a homoplastic sense.
HOMOPLASTIC adv. similar in structure and development but not descended from a recent common source.
HYSTRICOMORPHICHYSTRICOMORPHIC adj. belonging to the rodent suborder Hystricomorpha, which includes porcupines, cavies, agoutis, and chinchillas.
LYMPHOSARCOMATAlymphosarcomata n. Plural of lymphosarcoma.
LYMPHOSARCOMA n. a tumour of the lymph glands.
OLIGOCYTHAEMIASOLIGOCYTHAEMIA n. deficiency of red corpuscles in blood.
POLYCHROMATISMSPOLYCHROMATISM n. being multicoloured.
PROSENCHYMATOUSprosenchymatous adj. Relating to the prosenchyma.
PROSENCHYMATOUS adj. relating to prosenchyma, supporting plant tissue containing little protoplasm.
PSYCHOSOMIMETICPSYCHOSOMIMETIC adj. of drugs such as LSD and mescaline, capable of inducing psychotic symptoms, also PSYCHOTOMIMETIC.
PSYCHOTOMIMETICpsychotomimetic adj. (Pharmacology) That induces a temporary state of altered perception and symptoms similar to those of…
psychotomimetic n. (Pharmacology) Any psychotomimetic drug, such as LSD.
PSYCHOTOMIMETIC adj. of drugs such as LSD and mescaline, capable of inducing psychotic symptoms, also PSYCHOSOMIMETIC.
SCHOOLMISTRESSYschoolmistressy adj. Resembling or characteristic of a schoolmistress.
SCHOOLMISTRESSY adj. like a schoolmistress, prim.
THYROIDECTOMIESthyroidectomies n. Plural of thyroidectomy.
THYROIDECTOMY n. the surgical removal of the thyroid gland.

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: 133 words
  • Scrabble in French: 10 words
  • Scrabble in Spanish: 2 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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