APOPLECTIC is a 10 letter word that starts with A.

1. \Ap`o*plec"tic\(#) Apoplectical \Ap`o*plec"tic*al\,
   a. [L. apoplecticus, Gr. ?, fr. ?: cf. F. apoplectique. See
   {Apoplexy}.]
   Relating to apoplexy; affected with, inclined to, or
   symptomatic of, apoplexy; as, an apoplectic person, medicine,
   habit or temperament, symptom, fit, or stroke.
   

2. \Ap`o*plec"tic\, n.
   One liable to, or affected with, apoplexy.