Mammoth Uncensored Word List:
41 - 18 letter words starting with a

absentmindednesses accumulativenesses aceruloplasminemia adenocarcinomatous advantageousnesses aerothermodynamics agammaglobulinemia agammaglobulinemic alkyilcycloalkenes anagrammatizations anarchosyndicalism anarchosyndicalist aneurysmorrhaphies angiocardiographic angiostrongyliasis anthropocentricity anthropomorphising anthropomorphizing antiadministration anticholinesterase anticommercialisms anticonstitutional anticounterfeiting antidiscrimination antiferromagnetism antiinflammatories antivivisectionist apophthegmatically appreciativenesses apprehensivenesses arachibutyrophobes arachibutyrophobia arachibutyrophobic archaeoastronomers archaeoastronomies astrophotographers astrophotographies australopithecines autobiographically autolithographical autoradiographical