The Collaborative International Dictionary of English v.0.48:

Demolition \Dem`o*li"tion\ (?; 277), n. [L. demolitio, fr.
   demoliri: cf. F. d['e]molition. See Demolish.]
   The act of overthrowing, pulling down, or destroying a pile
   or structure; destruction by violence; utter overthrow; --
   opposed to construction; as, the demolition of a house, of
   military works, of a town, or of hopes.
   [1913 Webster]

WordNet (r) 3.0 (2006):

demolition
    n 1: an event (or the result of an event) that completely
         destroys something [syn: destruction, demolition,
         wipeout]
    2: the act of demolishing

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "demolition":
   answer, complete answer, confounding, confutation, contradiction,
   controversion, demolishment, denial, disassembly, discrediting,
   dismantlement, effective rejoinder, flattening, leveling,
   overthrow, overthrowal, razing, rebuttal, refutal, refutation,
   smashing, squelch, subversion, tearing down, undermining, unmaking,
   upset, upsetting, wreckage, wrecking