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There are 15 fifteen-letter words containing A, D, E, N, O, P, T and Y

CYCLOPENTADIENEcyclopentadiene n. (Organic chemistry) an unsaturated alicyclic hydrocarbon, C5H6; it forms complexes with some transition…
CYCLOPENTADIENE n. a colourless liquid unsaturated cyclic hydrocarbon obtained in the cracking of petroleum hydrocarbons and the distillation of coal tar, used in the manufacture of plastics and insecticides.
CYPROHEPTADINEScyproheptadines n. Plural of cyproheptadine.
CYPROHEPTADINE n. a powerful antihistamine drug used to treat allergies.
DAGUERREOTYPINGdaguerreotyping v. Present participle of daguerreotype.
DAGUERREOTYPE v. to develop by daguerreotype, a method of photography by mercury vapour development of silver iodide.
DEHYPNOTISATIONDEHYPNOTISATION n. the process of dehypnotising, also DEHYPNOTIZATION.
DEHYPNOTIZATIONdehypnotization n. The process of bringing somebody out of hypnotic trance.
DEHYPNOTIZATION n. the process of dehypnotizing, also DEHYPNOTISATION.
DEVELOPMENTALLYdevelopmentally adv. In terms of development.
DEVELOPMENTAL adv. relating to development.
DISPASSIONATELYdispassionately adv. In a dispassionate manner.
DISPASSIONATE adv. not influenced by strong feeling.
ENCYCLOPAEDISTSencyclopaedists n. Plural of encyclopaedist.
encyclopædists n. Plural of encyclopædist.
ENCYCLOPAEDIST n. one who compiles encyclopaedias, also ENCYCLOPEDIST.
IMPONDERABILITYimponderability n. The state or characteristic of being imponderable.
IMPONDERABILITY n. the state of being imponderable.
LYMPHADENOPATHYlymphadenopathy n. (Medicine) An abnormal enlargement of the lymph nodes; it is often a nonspecific sign of infection but…
LYMPHADENOPATHY n. abnormal enlargement of the lymph nodes.
LYMPHOADENOMATALYMPHOADENOMA n. a tumour of the lymph glands, aka Hodgkin's disease.
PERIODONTICALLYPERIODONTIC adv. relating to periodontia, the branch of dentistry concerned with periodontal diseases.
PLATINOCYANIDESplatinocyanides n. Plural of platinocyanide.
PLATINOCYANIDE n. a fluorescent complex salt formed by the union of a compound of platinum and cyanide with another cyanide.
POLYCHLORINATEDpolychlorinated adj. (Chemistry) Having many hydrogen atoms replaced by chlorine.
POLYCHLORINATED adj. as in polychlorinated biphenyl.
POLYUNSATURATEDpolyunsaturated adj. (Chemistry) Of or relating to long chain organic compounds that have multiple double bonds; polyunsaturated…
polyunsaturated adj. (Nutrition, of a fat or oil) Having a chemical structure that does not easily change into cholesterol…
POLYUNSATURATED adj. having many double or triple bonds in a molecule.

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: 164 words
  • Scrabble in French: 6 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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