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There are 15 twelve-letter words containing D, 2I, N, 2O, P and R

CONIDIOPHOREconidiophore n. A fungal hypha that produces conidia.
CONIDIOPHORE n. a hypha that produces conidia.
CONIDIOSPOREconidiospore n. (Biology) A unicellular spore produced asexually by a fungus.
CONIDIOSPORE n. a conidium.
DISOPERATIONDISOPERATION n. a mutually harmful relationship between two organisms in a community.
PERIODONTIASPERIODONTIA n. the branch of dentistry concerned with periodontal diseases.
PERIODONTICSperiodontics n. (Dentistry) The study of supporting structures of teeth—gums, alveolar bone, cementum, and the periodontal…
PERIODONTICS n. the study of gums, as a branch of dentistry.
PERIODONTISTperiodontist n. A dentist whose speciality is periodontics.
PERIODONTIST n. a dentist specialising in periodontics.
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.
PRECONDITIONprecondition n. A condition that requires satisfaction before taking a course of action.
precondition n. A medical illness, ailment, or adverse condition that exists before an insurance policy takes effect.
precondition v. (Medicine, biology) To condition in advance.
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.
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.
REPOSITIONEDrepositioned v. Simple past tense and past participle of reposition.
REPOSITION v. to change the position of.
WINDPROOFINGwindproofing v. Present participle of windproof.
WINDPROOF v. to make a fabric etc. proof against the wind.

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: 86 words
  • Scrabble in French: 13 words
  • Scrabble in Spanish: 29 words
  • Scrabble in Italian: 105 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 52 words


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