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There are 18 twelve-letter words containing A, D, E, I, O, P, R and Y

APERIODICITYaperiodicity n. The condition of being aperiodic.
APERIODICITY n. the state of being aperiodic.
APODYTERIUMSapodyteriums n. Plural of apodyterium.
APODYTERIUM n. an undressing-room at a Roman bath.
COPYREADINGSCOPYREADING n. the act of copyreading.
DEPRECIATORYdepreciatory adj. Pertaining to depreciation.
DEPRECIATORY adj. tending to depreciate.
DICTYOPTERANdictyopteran n. Any of the polyneopterous insects of the order Dictyoptera: the termites, cockroaches and mantids.
DICTYOPTERAN n. any insect of an order including cockroaches and mantises.
DISPENSATORYdispensatory adj. Granting, or authorized to grant, dispensations.
dispensatory n. (Pharmacy, pharmacology) A book containing a systematic description of drugs and of preparations made from them.
DISPENSATORY adj. granting dispensation.
HYDROCEPHALIhydrocephali n. Plural of hydrocephalus.
HYDROCEPHALUS n. an accumulation of serous fluid within the cranial cavity, also HYDROCEPHALY.
HYDROPATHIEShydropathies n. Plural of hydropathy.
HYDROPATHY n. the study of treating diseases with water.
IMPONDERABLYimponderably adv. In an imponderable manner.
IMPONDERABLE adv. not ponderable.
PERIODICALLYperiodically adv. In a manner that is regular or periodic.
periodically adv. Intermittently or recurrently.
PERIODICAL adv. periodic.
PLEURODYNIASpleurodynias n. Plural of pleurodynia.
PLEURODYNIA n. pain in the muscles of the chest or side.
PRASEODYMIUMpraseodymium n. A chemical element (symbol Pr) with an atomic number of 59, a soft, silvery, malleable and ductile metal…
PRASEODYMIUM n. a chemical element, a metal with green salts, isolated from the once-supposed element didymium.
PREDOMINANCYpredominancy n. Predominance.
PREDOMINANCY n. the state of being predominant, also PREDOMINANCE.
PYRIDOXAMINEpyridoxamine n. (Biochemistry) A constituent of vitamin B6, essential for the metabolism of starch and amino acids.
PYRIDOXAMINE n. a crystalline amine of the vitamin B6 group.
PYRITOHEDRALpyritohedral adj. Having the shape of pyrites.
pyritohedral adj. (Mathematics) Having the shape of a pyritohedron.
PYRITOHEDRAL adj. of or like a pyritohedron, a pentagonal dodecahedron.
RADIOTHERAPYradiotherapy n. The therapeutic use of ionizing radiation, almost exclusively used for the treatment of malignant disease.
RADIOTHERAPY n. treatment by radiation.
SPHEROIDALLYspheroidally adv. In a spheroidal manner.
SPHEROIDAL adv. having the form of a spheroid.
TRYPANOCIDEStrypanocides n. Plural of trypanocide.
TRYPANOCIDE n. a drug that kills trypanosomes.

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: 94 words
  • Scrabble in French: 14 words
  • Scrabble in Spanish: 4 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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