AWAKE is a 5 letter word that starts with A.

1. \A*wake"\, v. t. [imp. {Awoke}, {Awaked}; p. p. {Awaked};
   (Obs.) {Awaken}, {Awoken}; p. pr. & vb. n. {Awaking}. The
   form {Awoke} is sometimes used as a p. p.] [AS.
   [=a]w[ae]cnan, v. i. (imp. aw[=o]c), and [=a]wacian, v. i.
   (imp. awacode). See {Awaken}, {Wake}.]
   1. To rouse from sleep; to wake; to awaken.
            Where morning's earliest ray . . . awake her.
                                                  --Tennyson.
            And his disciples came to him, and awoke him,
            saying, Lord, save us; we perish.     --Matt. viii.
                                                  25.
   2. To rouse from a state resembling sleep, as from death,
      stupidity., or inaction; to put into action; to give new
      life to; to stir up; as, to awake the dead; to awake the
      dormant faculties.
            I was soon awaked from this disagreeable reverie.
                                                  --Goldsmith.
            It way awake my bounty further.       --Shak.
            No sunny gleam awakes the trees.      --Keble.
   

2. \A*wake"\, v. i.
   To cease to sleep; to come out of a state of natural sleep;
   and, figuratively, out of a state resembling sleep, as
   inaction or death.
         The national spirit again awoke.         --Freeman.
         Awake to righteousness, and sin not.     --1 Cor. xv.
                                                  34.
   

3. \A*wake"\, a. [From awaken, old p. p. of awake.]
   Not sleeping or lethargic; roused from sleep; in a state of
   vigilance or action.
         Before whom awake I stood.               --Milton.
         She still beheld, Now wide awake, the vision of her
         sleep.                                   --Keats.
         He was awake to the danger.              --Froude.