Mammoth Uncensored Word List:
35 words ending with a, 16 letters long

adenocarcinomata albuminurophobia atransferrinemia automatonophobia bromomenorrhagia bronchopneumonia carcinosarcomata cholangiosarcoma chondrodysplasia christianophobia coprastasophobia counterguerrilla cryoglobulinemia fibromyxosarcoma granulocytopenia hemangioblastoma hemichromatopsia hyperinsulinemia hypophosphatasia hypophosphatemia lymphangiectasia macrogenitosomia macrolepidoptera microalbuminuria microlepidoptera oligoastrocytoma pheochromocytoma photoaugiaphobia primeisodophobia pseudoparenchyma retinoblastomata rhabdomyosarcoma staphylococcemia thrombocytopenia trichotillomania