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There are 18 fifteen-letter words containing I, 2M, 2O, 2R and T

CHRONOGRAMMATICchronogrammatic adj. Relating to, or containing a chronogram.
CHRONOGRAMMATIC adj. of or like a chronogram, an inscription whose letters form a Roman numeral date.
HETEROMORPHISMSheteromorphisms n. Plural of heteromorphism.
HETEROMORPHISM n. the state of having different forms.
MICROMETEORITESmicrometeorites n. Plural of micrometeorite.
MICROMETEORITE n. a very small meteorite.
MICROMETEORITICmicrometeoritic adj. Relating to micrometeorites.
MICROMETEORITIC adj. of or like a micrometeorite.
MICROMETEOROIDSmicrometeoroids n. Plural of micrometeoroid.
MICROMETEOROID n. a small meteoroid.
MICROPHOTOMETERmicrophotometer n. (Physics) Any of various photometers used either to measure the variation of densities over small areas…
MICROPHOTOMETER n. an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate.
MICROPHOTOMETRYmicrophotometry n. Measurement performed with a microphotometer.
MICROPHOTOMETRY n. measurement by microphotometer, an instrument for measuring the amount of light transmitted or reflected by small areas or for measuring the relative densities of spectral lines on a photographic film or plate.
MICROPYROMETERSMICROPYROMETER n. a pyrometer for measuring the temperature of very small objects.
ORTHOCHROMATISMorthochromatism n. Quality of being orthochromatic.
ORTHOCHROMATISM n. the state of being orthochromatic, of photographic film, sensitive to all colours except red.
PHOTOGRAMMETRICphotogrammetric adj. Of or pertaining to photogrammetry.
PHOTOGRAMMETRIC adj. relating to measurement by photogrammetry.
PREFORMATIONISMpreformationism n. (Biology) the theory that all organisms start their existence already in a predetermined form upon conception…
PREFORMATIONISM n. the now exploded theory that the plant or animal (and therefore all its descendants) is already preformed in the germ.
RADIOMICROMETERradiomicrometer n. A device used to measure small changes in radiant heat, or in temperature.
RADIOMICROMETER n. an instrument for detecting and measuring small amounts of radiation, usually by a sensitive thermocouple.
STEREOISOMERISMstereoisomerism n. (Chemistry) A form of isomerism in which atoms are arranged differently about a chiral centre (or centre…
STEREOISOMERISM n. the property of substances which are stereoisomers.
THERIOMORPHISMStheriomorphisms n. Plural of theriomorphism.
THERIOMORPHISM n. the belief that gods exist in animal form.
THERMOCHROMISMSTHERMOCHROMISM n. a phenomenon in which certain dyes made from liquid crystals change colour reversibly when their temperature is change, also THERMOCHROMY.
THERMOPERIODISMthermoperiodism n. The property of being thermoperiodic.
THERMOPERIODISM n. the effect on an organism of rhythmic temperature variations.
TRIBROMOMETHANEtribromomethane n. (Organic chemistry) bromoform.
TRIBROMOMETHANE n. another name for bromoform, a bromine compound analogous to chloroform.
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: 128 words
  • Scrabble in French: 24 words
  • Scrabble in Spanish: 63 words
  • Scrabble in Italian: 192 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 82 words


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