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There are 20 fifteen-letter words containing I, M, 2O, 2R, S and U

CHONDROCRANIUMSCHONDROCRANIUM n. the cartilaginous parts of an embryonic cranium.
CIRCUMFORANEOUScircumforaneous adj. Wandering from place to place or market to market.
circumforaneous adj. (By extension) Indirect, roundabout, or unnecessarily complex.
CIRCUMFORANEOUS adj. wandering about as from market to market, vagrant, also CIRCUMFORANEAN.
CONSERVATORIUMSconservatoriums n. Plural of conservatorium.
CONSERVATORIUM n. (Latin) a school of music, also CONSERVATOIRE.
CRYPTOSPORIDIUMcryptosporidium n. Any protozoan of the genus Cryptosporidium, intestinal parasites of humans and other vertebrates that…
Cryptosporidium prop.n. A taxonomic genus within the family Cryptosporidiidae – coccidian protozoan parasites causing the disease…
CRYPTOSPORIDIUM n. any of a genus of protozoans parasitic in the gut of vertebrates including humans and sometimes causing diarrhea.
DEMERITORIOUSLYDEMERITORIOUS adv. not meritorious.
FORMULARISATIONformularisation n. Alternative spelling of formularization.
FORMULARISATION n. the act of formularising, also FORMULARIZATION.
MACROSPORANGIUMmacrosporangium n. (Botany) A megasporangium; sporangium or conceptacle containing only large spores; opposed to microsporangium.
MACROSPORANGIUM n. a sporangium producing only megaspores.
MERITORIOUSNESSmeritoriousness n. The property of being meritorious.
MERITORIOUS n. deserving of honor or esteem.
MICROSPORANGIUMmicrosporangium n. (Botany) A case, capsule or container that holds microspores.
MICROSPORANGIUM n. the sporangium in heterosporous plants where the microspores develop.
MORTIFEROUSNESSmortiferousness n. The quality of being mortiferous.
MORTIFEROUS n. death-bringing; fatal.
MULTIPROCESSORSmultiprocessors n. Plural of multiprocessor.
MULTIPROCESSOR n. a type of computer.
MYRISTICIVOROUSMYRISTICIVOROUS adj. feeding upon nutmegs.
OVERGLAMOURIZESSorry, definition not available.
OVERNOURISHMENTovernourishment n. Excessive nourishment.
RADIOSTRONTIUMSradiostrontiums n. Plural of radiostrontium.
RADIOSTRONTIUM n. a radioactive isotope of strontium, esp. strontium-90.
RUMORMONGERINGSRUMORMONGERING n. the spreading of rumours.
STROMBULIFEROUSSTROMBULIFEROUS adj. bearing spirally coiled organs.
ULTRAMICROSCOPEultramicroscope n. A microscope that uses bright illumination against a black background to view small particles.
ULTRAMICROSCOPE n. an instrument for viewing extremely small objects.
ULTRAMICROSCOPYultramicroscopy n. The scientific use of the ultramicroscope.
ULTRAMICROSCOPY n. microscopy using an ultramicroscope.
ULTRAMICROTOMESultramicrotomes n. Plural of ultramicrotome.
ULTRAMICROTOME n. a microtome for cutting extremely thin sections for electron microscopy.

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: 143 words
  • Scrabble in French: 41 words
  • Scrabble in Spanish: 110 words
  • Scrabble in Italian: 64 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 65 words


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