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There are 20 fifteen-letter words containing H, I, L, 2O, 2T and Y

AUTOTROPHICALLYautotrophically adv. In an autotrophic manner.
autotrophically adv. With regard to autotrophy.
AUTOTROPHIC adv. capable of building up food materials from inorganic matter.
CYANOETHYLATIONcyanoethylation n. (Organic chemistry) Any reaction, or treatment, with acrylonitrile, especially such treatment of cotton…
CYANOETHYLATION n. the act of introducing a cyano-ethyl group into a compound.
CYTOPATHOLOGIEScytopathologies n. Plural of cytopathology.
CYTOPATHOLOGY n. the study of cells in illness.
CYTOPATHOLOGISTcytopathologist n. A scientist whose speciality is cytopathology.
HETEROSOCIALITYheterosociality n. (Sociology, psychology) Social interaction between men and women.
HETEROSOCIALITY n. the state of being heterosocial.
HYPOVENTILATIONhypoventilation n. (Medicine) Respiratory depression, occurring when ventilation is inadequate to perform the necessary…
HYPOVENTILATION n. abnormally decreased speed and depth of breathing.
ICHTHYODORULITEichthyodorulite n. (Zoology) One of the spiny plates found on the back and tail of certain skates.
ichthyodorulite n. (Geology) A fossil fish-spine found in stratified rock.
ICHTHYODORULITE n. a fossilised fish-spine, also ICHTHYODORYLITE.
ICHTHYODORYLITEICHTHYODORYLITE n. a fossilised fish-spine, also ICHTHYODORULITE.
LABYRINTHODONTSlabyrinthodonts n. Plural of labyrinthodont.
LABYRINTHODONT n. an extinct amphibian, so called from a mazy pattern on a section of its teeth.
MYTHOLOGISATIONmythologisation n. Alternative form of mythologization.
MYTHOLOGISATION n. the process of mythologising, also MYTHOLOGIZATION.
MYTHOLOGIZATIONmythologization n. The act or process of mythologizing.
MYTHOLOGIZATION n. the process of mythologizing, also MYTHOLOGISATION.
ORTHODONTICALLYorthodontically adv. By orthodontic means.
ORTHODONTIC adv. relating to orthodontics, the rectification of crookedness in the teeth.
OSTEOPATHICALLYosteopathically adv. By means of osteopathy.
OSTEOPATHIC adv. relating to osteopathy.
PHOTOELASTICITYphotoelasticity n. A technique for studying and measuring the stresses and strains in an object by means of mechanical birefringence.
PHOTOELASTICITY n. the state of being photoelastic.
PHOTOMETRICALLYphotometrically adv. In a photometric manner.
photometrically adv. By using photometry.
PHOTOMETRIC adv. of or relating to photometry or the photometer.
PHOTOTACTICALLYphototactically adv. In terms of or by means of phototaxis.
PHOTOTACTIC adv. exhibiting phototaxis.
PHOTOTROPICALLYphototropically adv. In a phototropic manner.
PHOTOTROPIC adv. relating to phototropism, movement directed by light.
PHYTOPLANKTONICphytoplanktonic adj. Pertaining to, or derived from, phytoplankton.
PHYTOPLANKTONIC adj. relating to phytoplankton.
THYROCALCITONINthyrocalcitonin n. (Biochemistry) Alternative form of calcitonin.
THYROCALCITONIN n. a hormone secreted by the thyroid gland, controlling the rate of bone destruction.
ZOOPHYTOLOGISTSzoophytologists n. Plural of zoophytologist.
ZOOPHYTOLOGIST n. one who studies zoophytes.

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 WikWik.org and 1Word.ws.

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See this list for:

  • English Wiktionary: 145 words
  • Scrabble in French: 6 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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