13 letter words ending in is in the mammoth uncensored word list.

actinomycosis adenometritis adenomyositis aerosinusitis aflatoxicosis amniocentesis angiocarditis angiocholitis antiarthritis antibourgeois antihepatitis apocatastasis aqueocentesis arachnoiditis aspergillosis astereognosis atherogenesis autocatalysis autohemolysis autotoxicosis bacteriolysis barosinusitis bartonellosis bioprosthesis blastogenesis blastomycosis bronchiolitis calciphylaxis capillariasis capsulorhexis caravansarais caravanserais cardicentesis celiocentesis chiquichiquis cholecystitis chromatolysis chromomycosis clonorchiasis clostridiosis coenaesthesis coloproctitis colpocystitis cordocentesis cranioschisis cryptanalysis culdocentesis cyclodialysis cysticercosis cystocentesis cytodiagnosis dermostenosis dynamogenesis elephantiasis embryogenesis endometriosis endosymbiosis enterocolitis epanadiplosis epeirogenesis epicondylitis epidermolysis frontogenesis gametogenesis gastroparesis gastroschisis habronemiasis haematidrosis haematosepsis haemodialysis helminthiasis hematogenesis hematopoiesis heterogenesis heterozygosis histiocytosis histomoniasis histophilosis holomorphosis homomorphosis hydrarthrosis hypercyanosis hyperhidrosis hyperhydrosis hypersarcosis hypnoanalysis hypomorphosis immunogenesis interspinalis iontophoresis jejunoileitis keratogenesis labyrinthitis laemostenosis laryngostasis leishmaniasis leishmaniosis leptospirosis lymphadenitis lymphadenosis lymphangeitis lymphangiitis lymphocytosis lymphomatosis lymphopoiesis macroanalysis meibomianitis melanogenesis metamorphosis metasomatosis microanalysis mononucleosis morphogenesis mycoplasmosis mycotoxicosis myelofibrosis myelophthisis narcoanalysis narcohypnosis nephrogenesis neurosynapsis neurosyphilis neurothlipsis odontogenesis onomatopoesis onychomycosis organogenesis osteofibrosis osteomyelitis osteonecrosis osteopetrosis overdiagnosis paleotsunamis papilomatosis parakeratosis paramorphosis parapsoriasis parapsychosis parasymbiosis parasynthesis pathophoresis pecilomycosis perigastritis perihepatitis perijejunitis perinephritis periodontitis perityphlitis phleborrhexis phonophoresis photophoresis phytocoenosis plasmacytosis pneumatolysis pneumomycosis poliomyelitis polyarteritis polymorphosis polysynthesis porokeratosis postbourgeois presbyacousis proctocolitis psychogenesis psychokinesis pyelocystitis quadriparesis rachicentesis rickettsiosis sacrospinalis salmonellosis schizocytosis schizogenesis schizokinesis selfdiagnosis serodiagnosis speleogenesis spherocytosis spirochetosis spondylolysis subscapularis synchondrosis synecphonesis tachyphylaxis taphrogenesis tenosynovitis tenovaginitis teratogenesis thermogenesis thoracentesis toxoplasmosis trematodiasis treponemiasis trichomatosis tumorigenesis underanalysis underemphasis venosclerosis visceroptosis xanthomatosis xenodiagnosis xenomorphosis xeromorphosis