The best replacement for explosion is self destruct.

The best alternatives to explosion are rated as following:
★★★★★  self destruct
★★★★★  detonation
★★★★  backdraft
★★★★  implosion
★★★  combustion
★★★  destiny bond
★★  expansion
★★  burning
★★  guard break
★  blizzard
★  conflagration
★  population implosion
★  wind blade
★  sturdy
★  deflagration
★  port chicago explosion
★  fire
★  focus sash
★  self destruct pokemon
  flame sword
  eruption
  low explosion
  information overload

Your alternative for explosion is not listed? Suggest!
Speaking about explosion, one probably shouldn't forget about shockwave.

Other search terms related to explosion and their ratings are:
★★★★★ shockwave
★★★★★ focus sash
You have in mind a companion for explosion and it is not yet here? Propose!



Google Trends

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explosion
self destruct
detonation