  A search is reported for massive resonances decaying into a quark and a
vector boson (W or Z), or two vector bosons (WW, WZ, or ZZ). The analysis is
performed on an inclusive sample of multijet events corresponding to an
integrated luminosity of 19.7 inverse femtobarns, collected in proton-proton
collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the
LHC. The search uses novel jet-substructure identification techniques that
provide sensitivity to the presence of highly boosted vector bosons decaying
into a pair of quarks. Exclusion limits are set at a confidence level of 95% on
the production of: (i) excited quark resonances q* decaying to qW and qZ for
masses less than 3.2 TeV and 2.9 TeV, respectively, (ii) a Randall-Sundrum
graviton G[RS] decaying into WW for masses below 1.2 TeV, and (iii) a heavy
partner of the W boson W' decaying into WZ for masses less than 1.7 TeV. For
the first time mass limits are set on W' to WZ and G[RS] to WW in the all-jets
final state. The mass limits on q* to qW, q* to qZ, W' to WZ, G[RS] to WW are
the most stringent to date. A model with a "bulk" graviton G[Bulk] that decays
into WW or ZZ bosons is also studied.
