burst forth in WordNet English dictionary

1. be unleashed; emerge with violence or noise
   "His anger exploded"
   explode  burst forth  break loose 
   
2. come into or as if into flower
   "These manifestations effloresced in the past"
   effloresce  burst forth 
   
3. jump out from a hiding place and surprise (someone)
   "The attackers leapt out from the bushes"
   leap out  rush out  sally out  burst forth