Mammoth Uncensored Word List:
37 - 17 letter words starting with an

anachronistically anaesthesiologist anagrammatization anatomopathologic anesthesiologists angiocardiography anthropocentrisms anthropogenically anthropologically anthropomorphised anthropomorphisms anthropomorphists anthropomorphized anthropomorphizes antiassimilations antiauthoritarian anticlimactically anticommercialism anticomplementary anticonservations antidesegregation antiestablishment antievolutionisms antievolutionists antiferromagnetic antihumanitarians antihypertensives antimiscegenation antiorganizations antirationalities antireductionisms antireductionists antirevolutionary antischizophrenia antischizophrenic antisymmetrically antitechnological