anticlimactic vs. anticlimactical
agrobiologic vs. agrobiological
amphitheatric vs. amphitheatrical
anthropogenetic vs. anthropogenic
anthropometric vs. anthropometrical
anagrammatic vs. anagrammatical
actinometric vs. actinometrical
actinomycetal vs. actinomycetous
anencephalic vs. anencephalous
adrenergic vs. sympathomimetic
alphanumeric vs. alphanumerical
artiodactyl vs. artiodactylous
atrioventricular vs. auriculoventricular
archaeological vs. archeological
archaeologic vs. archaeological
archaeological vs. archeologic
archepiscopal vs. archiepiscopal
autobiographic vs. autobiographical