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There are 16 thirteen-letter words containing E, I, 3O, 2P and R

APOGEOTROPISMapogeotropism n. (Botany) An apogeotropic tendency.
APOGEOTROPISM n. bending up or away from the ground.
BIOPROSPECTORbioprospector n. One who engages in bioprospecting.
COPROPRIETORScoproprietors n. Plural of coproprietor.
COPROPRIETOR n. a joint proprietor.
MORPHOTROPIESMORPHOTROPY n. the effect on crystalline form of the addition or substitution of an element or radical.
NINCOMPOOPERYnincompoopery n. The beliefs and behaviours of a nincompoop; folly; idiocy.
NINCOMPOOPERY n. the state of being a nincompoop.
PHOTOPERIODICphotoperiodic adj. Of, pertaining to, or exhibiting photoperiodism.
PHOTOPERIODIC adj. relating to a photoperiod.
PHOTOPHORESISphotophoresis n. The slow drift of fine particles suspended in a gas away from a strong light source.
PHOTOPHORESIS n. migration of suspended particles under the influence of light.
PROCTOSCOPIESproctoscopies n. Plural of proctoscopy.
PROCTOSCOPY n. examination by use of a proctoscope, an instrument for examining the rectum.
PROPORTIONATEproportionate adj. In proportion; proportional; commensurable.
proportionate adj. Harmonious and symmetrical.
proportionate v. (Transitive) To make proportionate.
PROPOSITIONEDpropositioned v. Simple past tense and past participle of proposition.
PROPOSITION v. to make a proposal to.
PROPRIOCEPTORproprioceptor n. (Anatomy) A nerve ending that functions as a sensory receptor in muscles, tendons, joints and the inner…
PROPRIOCEPTOR n. a sense organ receptive to stimuli from within the body.
PROSOPOPOEIALprosopopoeial adj. Prosopopoeic.
prosopopœial adj. Obsolete typography of prosopopoeial.
PROSOPOPOEIAL adj. relating to prosopopeia, personification.
PROSOPOPOEIASprosopopoeias n. Plural of prosopopoeia.
prosopopœias n. Plural of prosopopœia.
PROSOPOPOEIA n. a figure of speech in which an imaginary or absent person is represented as speaking or acting, also PROSOPOPEIA.
PROTOTROPHIESprototrophies n. Plural of prototrophy.
PROTOTROPHY n. the state of being prototrophic.
SIPHONOPHORESsiphonophores n. Plural of siphonophore.
SIPHONOPHORE n. a marine creature, colonial in habit.
SPOROPOLLENINsporopollenin n. (Botany) A combination of biopolymers, observed in the exine layer of the spore and pollen wall.
SPOROPOLLENIN n. a polymer that comprises the exine (outer layer of the wall) of spores and pollen grains.

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: 72 words
  • Scrabble in French: 20 words
  • Scrabble in Spanish: 14 words
  • Scrabble in Italian: 42 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 32 words


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