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There are 20 fifteen-letter words containing I, N, O, P, 2R, T and Y

ANTIPORNOGRAPHYantipornography adj. Opposed to the distribution and consumption of pornography.
ANTIPORNOGRAPHY adj. opposed to pornography.
CROSSOPTERYGIANcrossopterygian adj. (Zoology) Of or pertaining to the Crossopterygii, an infraclass of bony fish.
crossopterygian n. (Zoology) One of the Crossopterygii.
CROSSOPTERYGIAN n. a member of a subclass of mostly extinct bony fishes, including the coelacanth.
DAGUERREOTYPINGdaguerreotyping v. Present participle of daguerreotype.
DAGUERREOTYPE v. to develop by daguerreotype, a method of photography by mercury vapour development of silver iodide.
ERYTHROPOIETINSerythropoietins n. Plural of erythropoietin.
ERYTHROPOIETIN n. a glycoprotein hormone that stimulates the production of red blood cells by stem cells in bone marrow.
HEMATOPORPHYRINhematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom).
HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins.
HYPERCORRECTIONhypercorrection n. (Linguistics) Nonstandard language use that results from the over-application of a perceived prescriptive rule.
hypercorrection n. (Linguistics) A nonstandard form so used.
HYPERCORRECTION n. a grammatical, usage or pronunciation mistake made by 'correcting' something that's right to begin with.
HYPEREXCRETIONSHYPEREXCRETION n. excessive excretion.
HYPERMODERNISTShypermodernists n. Plural of hypermodernist.
HYPERMODERNIST n. a practitioner of a hypermodernist style in art.
HYPERPRODUCTIONhyperproduction n. Excessive production.
HYPERPRODUCTION n. excessive production.
HYPERSECRETIONShypersecretions n. Plural of hypersecretion.
HYPERSECRETION n. excessive secretion.
INAPPROPRIATELYinappropriately adv. In an inappropriate manner.
INAPPROPRIATE adv. not appropriate, also UNAPPROPRIATE.
INTERPAROXYSMALinterparoxysmal adj. Between paroxysms.
INTERPAROXYSMAL adj. between paroxysms.
INTERPERSONALLYinterpersonally adv. In an interpersonal way.
INTERPERSONAL adv. relating to relations between persons.
NEUROPSYCHIATRYneuropsychiatry n. (Medicine) The branch of medicine dealing with disorders that have both neurological and psychiatric features.
NEUROPSYCHIATRY n. a branch of medicine concerned with both neurology and psychiatry.
PORPHYROGENITESporphyrogenites n. Plural of porphyrogenite.
PORPHYROGENITE n. a Byzantine emperor's son, born in the purple.
PROCRASTINATORYprocrastinatory adj. Of or pertaining to procrastination.
PROCRASTINATORY adj. tending to procrastinate, also PROCRASTINATIVE.
PROPORTIONALITYproportionality n. (Uncountable) the property of being proportional.
proportionality n. (Uncountable) the principle that government action ought to be proportional to the ends achieved (e…
proportionality n. (Countable) the degree to which something is in proportion.
PROPORTIONATELYproportionately adv. In a proportionate manner; with due proportion; proportionally.
PROPORTIONATE adv. in proportion.
PROTOPORPHYRINSprotoporphyrins n. Plural of protoporphyrin.
PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin.
SAUROPTERYGIANSsauropterygians n. Plural of sauropterygian.
SAUROPTERYGIAN n. any carnivorous Mesozoic marine reptile of the group Sauropterygia, with paddle-like limbs.

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: 178 words
  • Scrabble in French: 22 words
  • Scrabble in Spanish: 1 word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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