Mammoth Uncensored Word List:
156 words ending with se, 12 letters long

adverbialise aestheticise anaesthetise anathematise anorthoclase apostrophise asparaginase attitudinise autocatalyse ballanwrasse carbohydrase chapterhouse characterise charleyhorse charterhouse christianise chronologise clotheshorse collectivise conscientise conservatise containerise contemporise contrariwise copolymerise corporealise counterpeise counterpoise crosspurpose customshouse dealcoholise decapitalise decentralise decitizenise dehalogenase delegitimise demilitarise demineralise demonetarise denaturalise denuclearise depoliticise depolymerise depressurise desoxyribose desulphurise diphthongise disauthorise discourteise disfranchise disharmonise dispauperise dissocialise draughthouse editorialise educationese embourgeoise emotionalise endonuclease enterokinase entomologise essentialise excursionise exopeptidase feldspathose fictionalise flittermouse frankincense grammaticise haussmannise hispaniolise hyperintense illiberalise insolubilise interdiffuse legitimatise lithotritise magnetopause meetinghouse mercurialise merveilleuse metamorphose mineralogise misemphasise missionarise mithridatise mitrailleuse monodisperse multipurpose municipalise nonmanganese nucleotidase overdiagnose overexercise overidealise overorganise overpurchase overunionise overurbanise packinghouse parallelwise parameterise parchmentise parenthesise parochialise philosophise phlebotomise photocompose photooxidise phrenologise pictorialise politicalise polydisperse porcelainise porcellanise postexercise preauthorise premenopause presterilise propagandise psychologise quarterhorse quelquechose recapitalise reflectorise reinitialise remilitarise remineralise repopularise repressurise resynthesise ribonuclease sectarianise sectionalise semicomatose serpentinise sinisterwise somniloquise spiritualise steeplechase subjectivise suffruticose sycophantise symptomatise technicalise technologise telegraphese thymectomise tranquillise transaminase trichotomise ultraintense underutilise universalise unnaturalise unsensualise