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

DIPROTODONTSdiprotodonts n. Plural of diprotodont.
DIPROTODONT n. any marsupial of the Diprotodontia, the suborder including kangaroos, wombats, etc., also DIPROTODON.
OPISTHODOMOIopisthodomoi n. Plural of opisthodomos.
OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple.
OPISTHODOMOSopisthodomos n. (Greek architecture) A porch at the rear of a temple, set against the blank back wall of the cella.
OPISTHODOMOS n. (Greek) a portico or apartment at the back of an ancient Greek or Roman temple.
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.
PRODITORIOUSproditorious adj. (Obsolete) Treacherous, traitorous.
PRODITORIOUS adj. traitorous; prone to give away secrets.
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: 51 words
  • Scrabble in French: 1 word
  • Scrabble in Spanish: 10 words
  • Scrabble in Italian: 14 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 3 words


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