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There are 18 fifteen-letter words containing E, 2L, O, P, R, S and Y

ATMOSPHERICALLYatmospherically adv. In an atmospheric manner.
atmospherically adv. With regard to the atmosphere.
ATMOSPHERICAL adv. related to the atmosphere, also ATMOSPHERIC.
GEOSTROPHICALLYgeostrophically adv. By means of, or in terms of, geostrophy.
GEOSTROPHIC adv. relating to deflection due to effects of Earth's rotation.
HYPOCRYSTALLINEhypocrystalline adj. (Geology, of igneous rocks) having both glass and crystalline components.
HYPOCRYSTALLINE adj. of igneous rocks, having both glass and crystalline components.
HYPSOMETRICALLYhypsometrically adv. By means of, or in terms of, hypsometry.
HYPSOMETRICAL adv. of, relating to, or indicating elevation (as on a map), also HYPSOMETRIC.
INTERPERSONALLYinterpersonally adv. In an interpersonal way.
INTERPERSONAL adv. relating to relations between persons.
IONOSPHERICALLYionospherically adv. In terms of the ionosphere.
IONOSPHERIC adv. relating to the ionosphere.
MEGASPOROPHYLLSmegasporophylls n. Plural of megasporophyll.
MEGASPOROPHYLL n. a specialised leaf bearing or subtending one or more megasporangia.
PERISSOSYLLABICPERISSOSYLLABIC adj. having an additional syllable.
POLYACRYLAMIDESpolyacrylamides n. Plural of polyacrylamide.
POLYACRYLAMIDE n. a polyamide of acrylic acid.
POLYCRYSTALLINEpolycrystalline adj. Composed of an aggregate of very small crystals in random orientations.
POLYCRYSTALLINE adj. consisting of crystals variously oriented.
PREHISTORICALLYprehistorically adv. In a prehistoric manner.
prehistorically adv. Regarding prehistory.
PREHISTORICAL adv. relating to the time before historical records, also PREHISTORIC.
PREPOSITIONALLYprepositionally adv. In a prepositional manner.
prepositionally adv. As a preposition.
PREPOSITIONAL adv. relating to a preposition.
PROGRESSIONALLYPROGRESSIONAL adv. relating to progression.
SEPTENTRIONALLYseptentrionally adv. (Obsolete, nonce word) northerly.
SEPTENTRIONAL adv. (obsolete) northern, also SEPTENTRIAL.
SPLENDIFEROUSLYsplendiferously adv. In a splendiferous manner.
SPLENDIFEROUS adv. splendid.
STEREOTYPICALLYstereotypically adv. In a stereotypical manner or way.
STEREOTYPICAL adv. of or like a stereotype, also STEREOTYPIC.
SUPERNATIONALLYsupernationally adv. In a way that spans nations; above or beyond what is national.
SUPERNATIONAL adv. overriding national sovereignty; in or belonging to more than one nation.
SYLLABOGRAPHIESSYLLABOGRAPHY n. use of a writing system consisting of characters for syllables rather than for individual sounds or whole words.

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: 139 words
  • Scrabble in French: 8 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: 1 word


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