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There are 13 thirteen-letter words containing H, L, R, T and X

CEPHALOTHORAXcephalothorax n. The fused head and thorax of spiders and crustaceans.
CEPHALOTHORAX n. the body, or head with thorax, of spiders, crustaceans, etc.
EXHILARATIONSexhilarations n. Plural of exhilaration.
EXHILARATION n. the action of exhilarating.
EXTREMOPHILESextremophiles n. Plural of extremophile.
EXTREMOPHILE n. an organism that lives under extreme environmental conditions.
HETEROSEXUALSheterosexuals n. Plural of heterosexual.
HETEROSEXUAL n. a heterosexual person.
HEXOBARBITALSHEXOBARBITAL n. a barbiturate used as a sedative and hypnotic.
HYDROXYLATINGhydroxylating v. Present participle of hydroxylate.
HYDROXYLATE v. to introduce hydroxyl into.
HYDROXYLATIONhydroxylation n. (Organic chemistry) The introduction of a hydroxyl group into a molecule, especially by the replacement…
HYDROXYLATION n. the act of hydroxylating.
METHOXYCHLORSMETHOXYCHLOR n. a relatively nontoxic organochlorine insecticide.
ULTRAORTHODOXultraorthodox adj. Very orthodox, chiefly among Jewish sects.
ultra-Orthodox adj. (Of a Jew) Very strictly observant; Haredi; being either Hasidic or Litvish (Misnagdic).
ULTRAORTHODOX adj. extremely orthodox.
XEROPHTHALMIAxerophthalmia n. (Ophthalmology) A condition due to a deficiency of vitamin A where the conjunctiva and cornea become…
XEROPHTHALMIA n. extreme dryness of the conjunctive, thought to stem from a vitamin A deficiency, also XEROMA.
XEROPHTHALMICxerophthalmic adj. Of or pertaining to xerophthalmia.
XEROPHTHALMIC adj. relating to xerophthalmia.
XIPHIPLASTRALxiphiplastral adj. Relating to a xiphiplastron.
XIPHIPLASTRAL n. a type of chelonian.
XIPHIPLASTRONxiphiplastron n. The posterior, or fourth lateral plate in the plastron of a turtle.
XIPHIPLASTRON n. in chelonians, one of the plates forming the plastron, lying posterior to the hypoplastron.

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: 75 words
  • Scrabble in French: 7 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: 1 word
  • Scrabble in German: no word
  • Scrabble in Romanian: 20 words


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