We study the l⁻l⁺→ νν̄Zh process for future lepton colliders, whose cross section becomes larger than that for l⁻l⁺→ Zh in the energy region above a few TeV. % We classify the amplitudes into three main groups based on the topology of each Feynman diagram; vector boson scattering, l⁻W⁺ scattering, and W⁻l⁺ scattering, and study the interference patterns among the amplitudes. % We show that subtle gauge cancellation among the amplitudes at high energies in the unitary gauge is absent in the recently proposed Feynman-diagram gauge, and the physical distributions can be interpreted by the contributions from each subgroup. % We also find that the interference patterns in kinematical distributions of the Z boson can be understood by those in the l⁻l⁺→ νν̄Z process.