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There are 17 fifteen-letter words containing A, D, E, I, L, N, P 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.
DISPASSIONATELYdispassionately adv. In a dispassionate manner.
DISPASSIONATE adv. not influenced by strong feeling.
ENCYCLOPAEDICALencyclopaedical adj. Of or pertaining to encyclopaediae.
encyclopædical adj. Archaic spelling of encyclopaedical.
ENCYCLOPAEDICAL adj. of or relating to an encyclopedia; comprehensive; full of information, also ENCYCLOPEDIC, ENCYCLOPEDICAL.
ENCYCLOPAEDISMSENCYCLOPAEDISM n. the compiling of encyclopaedias, also ENCYCLOPEDISM.
ENCYCLOPAEDISTSencyclopaedists n. Plural of encyclopaedist.
encyclopædists n. Plural of encyclopædist.
ENCYCLOPAEDIST n. one who compiles encyclopaedias, also ENCYCLOPEDIST.
HYPERADRENALISMhyperadrenalism n. (Pathology) An excessive level of adrenal hormones in the body.
HYPERADRENALISM n. excessive activity of the adrenal gland.
HYPERVENTILATEDhyperventilated v. Simple past tense and past participle of hyperventilate.
HYPERVENTILATE v. to breathe rapidly and deeply.
IMPONDERABILITYimponderability n. The state or characteristic of being imponderable.
IMPONDERABILITY n. the state of being imponderable.
LYMPHADENITISESlymphadenitises n. Plural of lymphadenitis.
LYMPHADENITIS n. inflammation of the lymph nodes.
METHYLPHENIDATEmethylphenidate n. (Medicine) A stimulant used to treat attention deficit hyperactivity disorder and narcolepsy, better…
METHYLPHENIDATE n. a stimulant used in treating attention deficit disorder.
PENTADACTYLISMSPENTADACTYLISM n. the state of being pentadactylic.
PERIODONTICALLYPERIODONTIC adv. relating to periodontia, the branch of dentistry concerned with periodontal diseases.
PERPENDICULARLYperpendicularly adv. In a perpendicular manner.
PERPENDICULAR adv. at right angles to a line or plane.
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.
UNANTICIPATEDLYunanticipatedly adv. Without being anticipated; unexpectedly.
UNANTICIPATED adv. not anticipated.
UNDEPENDABILITYundependability n. The quality of being undependable.

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: 161 words
  • Scrabble in French: 4 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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