1. leap out, rush out, sally out, burst forth, appear

usage: jump out from a hiding place and surprise (someone); "The attackers leapt out from the bushes"

2. explode, burst forth, break loose, change state, turn

usage: be unleashed; emerge with violence or noise; "His anger exploded"

3. effloresce, burst forth, bloom, blossom, flower

usage: come into or as if into flower; "These manifestations effloresced in the past"

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