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There are 17 thirteen-letter words containing H, M, 2O, P, S and 2T

HAPTOTROPISMSHAPTOTROPISM n. curving in response to touch, as a tendril.
HOMEOPATHISTShomeopathists n. Plural of homeopathist.
HOMEOPATHIST n. one who practises homeopathy, also HOMEOPATH, HOMOEOPATH, HOMOEOPATHIST.
HOMOEOPATHISThomoeopathist n. Alternative form of homeopathist.
homœopathist n. Obsolete form of homeopathist.
HOMOEOPATHIST n. one who practises homoeopathy, also HOMEOPATH, HOMEOPATHIST, HOMOEOPATH.
OPISTHOSOMATAopisthosomata n. Plural of opisthosoma.
OPISTHOSOMA n. the abdomen of a spider or other arachnid.
ORTHOTROPISMSORTHOTROPISM n. vertical growth.
PHLEBOTOMISTSphlebotomists n. Plural of phlebotomist.
PHLEBOTOMIST n. one who carries out phlebotomies.
PHOTOCHEMISTSphotochemists n. Plural of photochemist.
PHOTOCHEMIST n. a practitioner of photochemistry.
PHOTOMETRISTSphotometrists n. Plural of photometrist.
PHOTOMETRIST n. one who practises photometry, that branch of science which treats of the measurement of the intensity of light.
PHOTOMONTAGESphotomontages n. Plural of photomontage.
PHOTOMONTAGE n. montage using photographic images.
PHOTOTROPISMSphototropisms n. Plural of phototropism.
PHOTOTROPISM n. movement directed by light.
SOMATOTROPHICsomatotrophic adj. That stimulates body growth, especially by producing somatotrophin.
SOMATOTROPHIC adj. promoting bodily growth, also SOMATOTROPIC.
SOMATOTROPHINsomatotrophin n. Alternative spelling of somatotropin.
SOMATOTROPHIN n. a polypeptide growth hormone, also SOMATOTROPIN, SOMATOTROPINE.
THERMOTROPICSTHERMOTROPIC n. a thermotropic plant.
THERMOTROPISMthermotropism n. (Botany) Thermotropic movement of a plant or plant part in response to changes in temperature.
THERMOTROPISM n. the growth of organism as influenced by heat.
THIGMOTROPISMthigmotropism n. (Biology) Growth or motion in response to touch.
THIGMOTROPISM n. the response of an organism to direct contact with a surface, e.g. a creeping plant that twines itself around a support.
TOPOCHEMISTRYtopochemistry n. (Chemistry) The chemistry of reactions that are dependent on, or change, the topology of the reactants.
TOPOCHEMISTRY n. the study of reactions that only occur at specific regions in a system.
TROPHOTROPISMtrophotropism n. The movements of the organs in a growing plant, as towards nutrient substances, induced by the chemical…
TROPHOTROPISM n. direction of growth by nutritional factors.

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: 73 words
  • Scrabble in French: 6 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 1 word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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