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There are 9 twelve-letter words containing D, E, I, 3O, P and S

CONIDIOSPOREconidiospore n. (Biology) A unicellular spore produced asexually by a fungus.
CONIDIOSPORE n. a conidium.
DICHROOSCOPEDICHROOSCOPE n. an instrument for examining crystals for dichroism, also DICHROISCOPE, DICHROSCOPE.
OPEIDOSCOPESopeidoscopes n. Plural of opeidoscope.
OPEIDOSCOPE n. an instrument for illustrating sound by means of light.
PHOTOIONISEDphotoionised adj. Alternative spelling of photoionized.
PHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE.
PHOTOOXIDISEPHOTOOXIDISE v. to undergo photooxidation, also PHOTOOXIDIZE.
PHOTOPERIODSphotoperiods n. Plural of photoperiod.
PHOTOPERIOD n. the period during every 24 hours when an organism is exposed to daylight.
PODOCONIOSESPODOCONIOSIS n. endemic elephantiasis of the lower legs.
PROTOCOLISEDprotocolised v. Simple past tense and past participle of protocolise.
PROTOCOLISE v. to make a protocol of, also PROTOCOLIZE.
RADIOISOTOPEradioisotope n. (Physics) a radioactive isotope of an element.
RADIOISOTOPE n. a radioactive isotope.

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: 59 words
  • Scrabble in French: 6 words
  • Scrabble in Spanish: 20 words
  • Scrabble in Italian: 12 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 5 words


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