The Collaborative International Dictionary of English v.0.48:

Pyrotechnics \Pyr`o*tech"nics\, n.
   The art of making fireworks; the manufacture and use of
   fireworks; pyrotechny.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pyrotechnics
    n 1: (music) brilliance of display (as in the performance of
         music)
    2: the craft of making fireworks [syn: pyrotechnics,
       pyrotechny]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "pyrotechnics":
   calorimetry, debating, declamation, demagogism, elocution,
   eloquence, firework, fireworks, forensics, homiletics, lecturing,
   oratory, platform oratory, public speaking, pyrotechnic,
   pyrotechny, rabble-rousing, rhetoric, speaking, speechcraft,
   speechification, speeching, speechmaking, stump speaking,
   thermochemistry, thermodynamics, thermotics, wordcraft