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There are 17 thirteen-letter words containing H, I, L, 3O, R and T

AEROLITHOLOGYaerolithology n. The study of meteorites.
AEROLITHOLOGY n. the study of aerolites.
CHLOROFORMISTchloroformist n. (Medicine, archaic) One who uses chloroform as an anaesthetic.
CHLOROFORMIST n. one who administers chloroform.
CHOREOLOGISTSchoreologists n. Plural of choreologist.
CHOREOLOGIST n. a student of choreology.
CHRONOLOGISTSchronologists n. Plural of chronologist.
CHRONOLOGIST n. an expert in chronology, also CHRONOLOGER.
DROOLWORTHIERDROOLWORTHY adj. inspiring or likely to inspire excessive enthusiasm or pleasure; extremely attractive or desirable.
HEORTOLOGICALheortological adj. Of or relating to heortology.
HEORTOLOGICAL adj. relating to heortology, the study of religious feasts.
HEORTOLOGISTSheortologists n. Plural of heortologist.
HEORTOLOGIST n. one who practises heortology, the study of religious feasts.
HOMOIOTHERMALhomoiothermal adj. (Biology) Maintaining a uniform temperature; haematothermal; homothermic; applied to warm-blooded animals.
HOMOIOTHERMAL adj. keeping the same temperature, warm-blooded, also HOMEOTHERMAL, HOMOEOTHERMAL, HOMOEOTHERMIC, HOMOEOTHERMOUS, HOMOTHERMAL, HOMOTHERMIC.
MORPHOLOGISTSmorphologists n. Plural of morphologist.
MORPHOLOGIST n. a student of morphology.
OLIGOTROPHIESOLIGOTROPHY n. the state of being oligotrophic.
ORCHIDOLOGISTorchidologist n. One who studies orchids.
ORCHIDOLOGIST n. one who studies orchids.
ORNITHOLOGIESornithologies n. Plural of ornithology.
ORNITHOLOGY n. the study of birds.
ORNITHOLOGISTornithologist n. A person who studies or practices ornithology.
ORNITHOLOGIST n. one who studies birds.
ORTHODIAGONALorthodiagonal n. (Crystallography) The diagonal or lateral axis in a monoclinic crystal which is at right angles with…
ORTHODIAGONAL n. in a monoclinic crystal, that lateral axis which is perpendicular to the vertical axis.
ORTHOGONALISEorthogonalise v. Alternative form of orthogonalize.
ORTHOGONALISE v. to make orthogonal, also ORTHOGONALIZE.
ORTHOGONALITYorthogonality n. (Mathematics, statistics, software engineering) The property of being orthogonal.
ORTHOGONALITY n. the state of being orthogonal.
ORTHOGONALIZEorthogonalize v. (Transitive) To make orthogonal.
ORTHOGONALIZE v. to make orthogonal, also ORTHOGONALISE.

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: 87 words
  • Scrabble in French: 8 words
  • Scrabble in Spanish: 4 words
  • Scrabble in Italian: 8 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 61 words


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