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There are 20 twelve-letter words containing H, P, R, T and X

ASPHYXIATORSasphyxiators n. Plural of asphyxiator.
ASPHYXIATOR n. one of who asphyxiates.
AUXOTROPHIESauxotrophies n. Plural of auxotrophy.
AUXOTROPHY n. the state of being auxotrophic, requiring a specific growth substance beyond the minimum required for normal metabolism.
AXEROPHTHOLSAXEROPHTHOL n. vitamin A, a pale yellow crystalline substance, deficiency of which causes xerophthalmia.
EXECUTORSHIPexecutorship n. The office or position of an executor.
EXECUTORSHIP n. the office of executor.
EXTRAHEPATICextrahepatic adj. Originating or occurring outside the liver.
EXTRAHEPATIC adj. situated or originating outside the liver.
EXTREMOPHILEextremophile n. (Ecology) An organism that lives under extreme conditions of temperature, salinity etc; commercially…
EXTREMOPHILE n. an organism that lives under extreme environmental conditions.
HETERODUPLEXheteroduplex n. (Biochemistry) A nucleic acid composed of two chains with each derived from a different parent molecule.
heteroduplex v. To form such a compound by genetic recombination.
HETERODUPLEX n. a nucleic-acid molecule, such as DNA, composed of two chains with each derived from a different parent molecule.
HYPEREXCITEDhyperexcited adj. Very highly excited.
HYPEREXCITED adj. excessively excited.
HYPEREXTENDShyperextends v. Third-person singular simple present indicative form of hyperextend.
HYPEREXTEND v. to extend so that the angle between bones of a joint is greater than normal.
HYPERTEXTUALhypertextual adj. Of or relating to hypertext.
MORPHOSYNTAXmorphosyntax n. (Linguistics) Morphology and syntax regarded as an interlinked unit.
morpho-syntax n. (Linguistics) The system of the internal structure of words (morphology) and the way in which words…
morpho-syntax n. (Linguistics, formal) Grammar.
ORTHOPRAXIESORTHOPRAXY n. the treatment of deformities in the human body by mechanical appliances.
PNEUMOTHORAXpneumothorax n. (Medicine) Presence of air inside the pleural cavity, usually caused by injury either to the lung or the chest wall.
PNEUMOTHORAX n. accumulation of air or gas in the pleural cavity.
THIXOTROPIESTHIXOTROPY n. the property of certain gels of becoming fluid when agitated and of reverting back to a gel when left to stand.
TROPHALLAXEStrophallaxes n. Plural of trophallaxis.
TROPHALLAXIS n. mutual exchange of nutriment in symbiosis.
TROPHALLAXIStrophallaxis n. (Biology) The mutual exchange of (fluid) food between individuals, especially in social insects.
TROPHALLAXIS n. mutual exchange of nutriment in symbiosis.
XANTHOPTERINxanthopterin n. A yellow crystalline solid that occurs mainly in the wings of butterflies and in the urine of mammals…
XANTHOPTERIN n. a yellow pigment obtainable from the wings of yellow butterflies and the urine of mammals, also XANTHOPTERINE.
XEROPHYTISMSXEROPHYTISM n. being a xerophyte.
XIPHIPLASTRAxiphiplastra n. Plural of xiphiplastron.
XIPHIPLASTRON n. in chelonians, one of the plates forming the plastron, lying posterior to the hypoplastron.
XIPHISTERNUMxiphisternum n. (Biology, medicine) Synonym of xiphoid process.
XIPHISTERNUM n. the posterior and smallest of the three divisions of the sternum.

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: 77 words
  • Scrabble in French: 13 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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