Mammoth Uncensored Word List:
84 words ending with p, 11 letters long

achaenocarp admiralship advisership amateurship apostleship artisanship athwartship auditorship bailiffship baillieship basidiocarp batsmanship benchership bondmanship bushmanship captainship chapmanship citizenship clubmanship colonelship comradeship corivalship coronership countercoup counterstep creatorship curatorship denizenship dipterocarp electorship emperorship foremanship generalship grandeeship janitorship justiceship kindredship lectureship lifemanship magnateship managership marshalship messiahship monitorship mountaintop oarsmanship overdevelop partnership patroonship plowmanship praetorship prefectship prelateship premiership primateship proctorship prophetship provostship questorship rubberstamp scholarship senatorship servantship sheriffship showmanship soldiership speakership sponsorship stewardship studentship subjectship surgeonship teachership thunderclap traineeship traitorship tribuneship trusteeship vaivodeship viceroyship voivodeship whistlestop wordmanship workmanship