Mammoth Uncensored Word List:
22 - 15 letter words starting with ap

apheliotropisms apocalyptically apocalypticisms apolipoproteins apoliticalities apophthegmatise apophthegmatist apophthegmatize apothegmatising apothegmatizing appealabilities appealingnesses appendicularian applicabilities apprenticehoods apprenticements apprenticeships approachability appropinquating appropinquation appropinquities appropriateness