Mammoth Uncensored Word List:
23 words ending with pe, 12 letters long

aethrioscope bronchoscope dichroiscope ebullioscope electroscope galvanoscope hysteroscope isoteniscope kaleidoscope laryngoscope myringoscope oscilloscope philanthrope praxinoscope radioisotope resectoscope snooperscope spectroscope sphygmoscope synchroscope thoracoscope ureteroscope urethroscope