  Random coincidence of 2{\nu}2{\beta} decay events could be one of the main
sources of background for 0{\nu}2{\beta} decay in cryogenic bolometers due to
their poor time resolution. Pulse-shape discrimination by using front edge
analysis, the mean-time and \c{hi}2 methods was applied to discriminate
randomly coinciding 2{\nu}2{\beta} events in ZnMoO4 cryogenic scintillating
bolometers. The background can be effectively rejected on the level of 99% by
the mean-time analysis of heat signals with the rise time about 14 ms and the
signal-to-noise ratio 900, and on the level of 98% for the light signals with 3
ms rise time and signal-to-noise ratio of 30 (under a requirement to detect 95%
of single events). Importance of the signal-to-noise ratio, correct finding of
the signal start and choice of an appropriate sampling frequency are discussed.
