Mammoth Uncensored Word List:
41 words that are 18 letters long beginning with a in the mammoth uncensored word list.

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