apistia: faithlessness in marriage
apocatastisis: reversion or restoration to original position
apodysophilia: feverish desire to undress
apophasis: saying something by stating that you will not mention it
apostasy: renunciation of former beliefs
apotropaic: designed to turn away evil
applanate: flat; flattened; compressed
appropinquity: nearness
apse: rounded extension of church or other building
apyrexy: period of intermission in a fever
aquiline: of or pertaining to eagles; hooked like an eagle's beak
araneiform: shaped like a spider (I thought this might be error, but it checks out OK)
arboricolous: growing on or living in trees