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There are 18 fifteen-letter words containing I, 2O, 2R, 2T and U

AUTOCORRELATIONautocorrelation n. (Statistics, signal processing) The cross-correlation of a signal with itself: the correlation between…
AUTOCORRELATION n. the correlation between paired values of a function of a mathematical or statistical variable taken at usually constant intervals that indicates the degree of periodicity of the function.
COUNTERREACTIONcounterreaction n. An action taken in response to a prior reaction.
COUNTERREACTION n. a reaction in opposition to another reaction.
INTERLOCUTORILYINTERLOCUTORY adv. made during the progress of a legal action and not final or definitive.
NEUROPROTECTIVEneuroprotective adj. That provides neuroprotection.
neuroprotective n. Any neuroprotective agent.
NONCONTRIBUTORYnoncontributory adj. Describing a pension plan in which the members do not provide their own direct contributions (that is…
noncontributory adj. Not being a contributing factor (to a decision, analysis, or situation), such as not contributing to…
NONCONTRIBUTORY adj. not contributory.
OVERSATURATIONSoversaturations n. Plural of oversaturation.
OVERSATURATION n. excessive saturation.
PRECONSTRUCTIONpreconstruction n. Work done in preparation for construction, such as of a building.
preconstruction n. A preconception or prejudice.
PRECONSTRUCTION n. construction in advance.
PROTOSPATHARIUSprotospatharius n. Alternative form of protospatharios.
PROTOSPATHARIUS n. (historical) the captain of the guards at Byzantium, also PROTOSPATAIRE, PROTOSPATHAIRE.
RADIOSTRONTIUMSradiostrontiums n. Plural of radiostrontium.
RADIOSTRONTIUM n. a radioactive isotope of strontium, esp. strontium-90.
REAUTHORISATIONreauthorisation n. Alternative form of reauthorization.
REAUTHORISATION n. the process of reauthorising, also REAUTHORIZATION.
REAUTHORIZATIONreauthorization n. A second or subsequent authorization.
reauthorization n. A renewal of an authorization.
REAUTHORIZATION n. the process of reauthorizing, also REAUTHORISATION.
RECONSTRUCTIONSreconstructions n. Plural of reconstruction.
RECONSTRUCTION n. the action of reconstructing.
REINTRODUCTIONSreintroductions n. Plural of reintroduction.
REINTRODUCTION n. the act of reintroducing.
TRINITROTOLUENEtrinitrotoluene n. A highly explosive yellow crystalline substance, (CH3C6H2(NO2)3), obtained by reacting nitric acid with…
TRINITROTOLUENE n. a powerful explosive, commonly called TNT, also TRINITROTOLUOL.
TRINITROTOLUOLStrinitrotoluols n. Plural of trinitrotoluol.
TRINITROTOLUOL n. a powerful explosive, commonly called TNT, also TRINITROTOLUENE.
ULTRAMICROTOMESultramicrotomes n. Plural of ultramicrotome.
ULTRAMICROTOME n. a microtome for cutting extremely thin sections for electron microscopy.
UNPROPORTIONATEunproportionate adj. Not proportionate; disproportionate.
UNPROPORTIONATE adj. not proportionate.
WATERCOLOURISTSwatercolourists n. Plural of watercolourist.
WATERCOLOURIST n. an artist who works with watercolour, also WATERCOLORIST.

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: 162 words
  • Scrabble in French: 48 words
  • Scrabble in Spanish: 14 words
  • Scrabble in Italian: 61 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 218 words


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