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There are 17 fifteen-letter words containing I, N, O, 2P, R, S and Y

ANTHROPOPSYCHICANTHROPOPSYCHIC adj. ascribing to nature or God of a soul or mind like man's.
CYPROHEPTADINEScyproheptadines n. Plural of cyproheptadine.
CYPROHEPTADINE n. a powerful antihistamine drug used to treat allergies.
HYPERPOLARISINGhyperpolarising v. Present participle of hyperpolarise.
HYPERPOLARISE v. to increase the difference in electric potential across a cell membrane, also HYPERPOLARIZE.
HYPERRESPONSIVEhyperresponsive adj. Involving an abnormally high degree of responsiveness.
HYPERRESPONSIVE adj. excessively responsive.
HYPNOTHERAPISTShypnotherapists n. Plural of hypnotherapist.
HYPNOTHERAPIST n. one who practises hypnotherapy.
NEUROHYPOPHYSISneurohypophysis n. (Anatomy) The posterior lobe of the pituitary gland, responsible for the release of oxytocin and antidiuretic…
NEUROHYPOPHYSIS n. the portion of the pituitary gland that is composed of the infundibulum and posterior lobe and is concerned with the secretion of various hormones.
PHARYNGOSCOPIESpharyngoscopies n. Plural of pharyngoscopy.
PHARYNGOSCOPY n. examination of the pharynx.
PHOSPHORYLATINGphosphorylating v. Present participle of phosphorylate.
phosphorylating adj. That phosphorylates.
PHOSPHORYLATE v. to cause (an organic compound) to take up or combine with phosphoric acid or a phosphorus-containing group.
PHOSPHORYLATIONphosphorylation n. (Biochemistry) the process of transferring a phosphate group from a donor to an acceptor; often catalysed by enzymes.
PHOSPHORYLATION n. the process of phosphorylating a chemical compound.
PORPHYROGENITESporphyrogenites n. Plural of porphyrogenite.
PORPHYROGENITE n. a Byzantine emperor's son, born in the purple.
PREPOSITIONALLYprepositionally adv. In a prepositional manner.
prepositionally adv. As a preposition.
PREPOSITIONAL adv. relating to a preposition.
PREPOSSESSINGLYprepossessingly adv. In a prepossessing manner.
PREPOSSESSING adv. creating a favorable impression; attractive.
PROPOSITIONALLYpropositionally adv. In a propositional manner.
PROPOSITIONAL adv. of the nature of a proposition.
PROPYLITISATIONPROPYLITISATION n. the process of propylitising, also PROPYLITIZATION.
PROTOPORPHYRINSprotoporphyrins n. Plural of protoporphyrin.
PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin.
SEMIPORNOGRAPHYsemipornography n. Material that is partly or somewhat pornographic.
SEMIPORNOGRAPHY n. material approaching the pornographic.
SULPHINPYRAZONEsulphinpyrazone n. Alternative form of sulfinpyrazone.
SULPHINPYRAZONE n. a drug used to treat gout.

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: 116 words
  • Scrabble in French: 8 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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