The Collaborative International Dictionary of English v.0.48:

Panoply \Pan"o*ply\ (p[a^]n"[-o]*pl[y^]), n. [Gr. panopli`a;
   pa^s, pa^n, all + "o`plon tool, implement, in pl., armor,
   arms.]
   1. Defensive armor in general; a full suit of defensive
      armor. --Milton.
      [1913 Webster]

            We had need to take the Christian panoply, to put on
            the whole armor of God.               --Ray.
      [1913 Webster]

   2. Hence: Any full set of elaborate attire, complete with
      accessories or accompanying paraphernalia; any elaborate
      special or ceremonial attire and equipment.
      [PJC]

   3. Hence: Any impressive complete array; as, the full panoply
      of a presidential funeral.
      [PJC]

   4. Hence: [Fig.:] Any complete array of devices used in an
      endeavor; as, to deploy the full panoply of writer's
      techniques.
      [PJC] panoptic

WordNet (r) 3.0 (2006):

panoply
    n 1: a complete and impressive array

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "panoply":
   armature, armor, armor plate, army, body armor, buckler,
   bulletproof vest, chain armor, chain mail, cluster, coat of mail,
   cohue, cortex, crowd, crush, deluge, flock, flood, galaxy,
   habergeon, harness, hauberk, heap, horde, host, jam, legion, mail,
   mass, mob, multitude, needles, plate armor, press,
   protective covering, rabble, rout, ruck, shell, shield, spate,
   spines, suit of armor, thick skin, throng