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There are 13 twelve-letter words containing A, D, 2I, 2O, P and R

AECIDIOSPOREAECIDIOSPORE n. a spore produced in an aecidium.
BASIDIOSPOREbasidiospore n. (Biology) A sexually reproductive spore produced by fungi of the phylum Basidiomycota.
BASIDIOSPORE n. a spore produced by a basidium.
DIAGEOTROPICdiageotropic adj. (Botany) Relating to, or exhibiting, diageotropism.
DIAGEOTROPIC adj. tending to grow at right angles to the line of gravity.
DISOPERATIONDISOPERATION n. a mutually harmful relationship between two organisms in a community.
PERIODONTIASPERIODONTIA n. the branch of dentistry concerned with periodontal diseases.
PEROXIDATIONperoxidation n. (Chemistry) Any oxidation reaction, especially of an oxide, that produces a peroxide.
peroxidation n. (Organic chemistry) The reaction of a double bond with a peroxide.
PEROXIDATION n. the creation of a peroxide.
PROBOSCIDIANproboscidian adj. Alternative spelling of proboscidean.
proboscidian n. Alternative spelling of proboscidean.
PROBOSCIDIAN n. any of an order of large mammals comprising the elephants and extinct related forms, also PROBOSCIDEAN.
PROPANEDIOICPROPANEDIOIC adj. as in propanedioic acid, a white crystalline acid, aka malonic acid.
RADIOISOTOPEradioisotope n. (Physics) a radioactive isotope of an element.
RADIOISOTOPE n. a radioactive isotope.
RADIOPHONICSradiophonics n. (UK, dated) radiophonic sounds and music, or the techniques used to produce them.
RADIOPHONICS n. the business of producing electronic music.
RADIOPHONIESRADIOPHONY n. the art or practice of using the radiophone.
RADIOPHONISTRADIOPHONIST n. one who uses a radiophone.
RADIOSCOPIESradioscopies n. Plural of radioscopy.
RADIOSCOPY n. examination of opaque bodies by X-rays.

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: 69 words
  • Scrabble in French: 13 words
  • Scrabble in Spanish: 51 words
  • Scrabble in Italian: 103 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 83 words


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