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List of 12-letter words containing

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There are 17 twelve-letter words containing A, 2I, 2O and 2R

ARBORISATIONARBORISATION n. an arborescence, also ARBORIZATION.
ARBORIZATIONarborization n. Any branching, treelike shape or formation.
arborization n. The formation of such a shape or formation.
ARBORIZATION n. an arborescence, also ARBORISATION.
COMPRIMARIOScomprimarios n. Plural of comprimario.
COMPRIMARIO n. in opera or ballet, a role of secondary importance; a singer or dancer playing such a role.
GRANODIORITEgranodiorite n. (Petrology) An intrusive igneous rock similar to granite, but containing more plagioclase than potassium feldspar.
GRANODIORITE n. an igneous plutonic rock, less felsic than granite.
IMPROPRIATORimpropriator n. (Archaic) A layperson in possession of ecclesiastical property.
IMPROPRIATOR n. a layman who is in possession of a benefice or its revenues.
IMPROVISATORimprovisator n. One who improvises.
improvisator n. An improvvisatore.
IMPROVISATOR n. an improviser, also IMPROVISER, IMPROVISOR.
INVIGORATORSinvigorators n. Plural of invigorator.
INVIGORATOR n. one who invigorates.
IRROTATIONALirrotational adj. Not rotating or not pertaining to rotation.
irrotational adj. (Calculus) Having zero curl.
IRROTATIONAL adj. not rotating or involving rotation.
MORIGERATIONmorigeration n. (Obsolete) obsequiousness; obedience.
MORIGERATION n. deferential behaviour.
PROPITIATORSpropitiators n. Plural of propitiator.
PROPITIATOR n. one who propitiates.
PROPITIATORYpropitiatory adj. Intended to propitiate, reconcile, expiate or appease; conciliatory.
PROPITIATORY adj. serving to propitiate, also PROPITIATIOUS, PROPITIATIVE.
PROPITIATORY n. the mercy seat.
PROVISIONARYprovisionary adj. Provisional.
PROVISIONARY adj. provisional.
PROVISIONARY n. something provisional.
RADICIVOROUSradicivorous adj. (Zoology, rare) That feeds on plant roots.
RADICIVOROUS adj. eating roots.
RADIOTHORIUMradiothorium n. (Physics) The radioactive isotope thorium-228.
RADIOTHORIUM n. a radioactive isotope of thorium with the mass number 228.
RAINPROOFINGrainproofing v. Present participle of rainproof.
RAINPROOF v. to make proof against rain.
RATIOCINATORratiocinator n. One who ratiocinates; a reasoner.
RATIOCINATOR n. one who ratiocinates, reasons or argues logically.
REORDINATIONreordination n. A second or subsequent ordination; an act of reordaining.
REORDINATION n. the act of reordinating.

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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