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There are 681 eighteen-letter words containing 4O

(page 5)

pyrophosphorolyticpyropoikilocytosisradiochronologicalradiomorphologicalradiotoxicologicalrectosigmoidoscopyrenohistopathologyreprotoxicologicalrestoration␣ecologyrhabdodontomorphanribonucleoproteomerode␣the␣cotton␣horserootinest␣tootinest rootin'est␣tootin'estrose-colored␣pastorsrose-coloured␣pastorrostrodorsolateralsalpingooophoritis salpingo-oophoritisSanto␣Tomás␣Ocotepecschool␣of␣hard␣knocksschool␣psychologistschooner␣on␣the␣rockssclerochronologiessecretomotorneuronseroepizootiologicshoot␣off␣at␣the␣mouthshoots␣one's␣mouth␣offshow␣one's␣true␣colorsshow␣someone␣the␣doorsialoglycoproteomeskeletochronologicskotomorphogenesissmoked␣someone's␣polesmokes␣someone's␣polesocial␣anthropologysociochronobiologysocioendocrinologysociophilosophicalsociopoliticolegalsociopsychologicalsociopsychologistssociotechnologicalSoke␣of␣Peterboroughsolenofilomorphidssolids␣of␣revolutionsomatoform␣disordersomatomammotropinssomatosensorimotorsopranino␣saxophonesoprano␣saxophonistsoprillo␣saxophonesspoil␣someone␣rottenspongiotrophoblaststep␣on␣someone's␣toesstereofluoroscopicstrontiopyrochloresulfonatoisoindolesulfoniopropionatesymproportionationsynaptosoneurosometalk-aloud␣protocols talk␣aloud␣protocolstephrochronologistthe␣joke␣is␣on␣someonethermoconformationthermophotovoltaicthink-aloud␣protocol think␣aloud␣protocolThrockmorton␣Countythrombocytopoiesisthrombocytopoieticthromboembolectomythrow␣down␣one's␣toolsthrown␣someone␣a␣bonethrows␣someone␣a␣bonethyrotropic␣hormonetocopherolquinonestomorrow␣never␣comestoo␣big␣for␣one's␣bootstoo␣close␣for␣comforttoo␣much␣informationtopoisomerizationstore␣someone␣a␣new␣onetorn␣someone␣a␣new␣oneto␣the␣top␣of␣one's␣benttoxicopathologicaltoxicopharmacologytrooping␣the␣colourstwo-point␣conversionVerbano-Cusio-Ossolavideobronchoscopesvideoduodenoscopesvideostroboscopiesvote␣of␣no␣confidencewoolly␣mouse␣opossumwork␣someone's␣ass␣offwound␣up␣one's␣bottomsyellow␣wood␣anemoneszero-knowledge␣proofzoopharmacologicalzoosporangiophores

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