Collapse
Set off
Set off verb - To cause to function.
Both terms in one sentence
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Although if you want to be technical, it's actually Samus's actions after the boss is already dead that set off the planetary collapse.
Source: Load-Bearing Boss - The worst-case is that it would set off a chain-reaction engulfing multiple dimensions and collapse half of reality.
Source: Fan Fic / Infinity -
Disaster Dominoes: The bombs in Venice set off the domino-style collapse of one building after another.
Cite this Source
Set off and Collapse. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/collapse/set_off
Collapse & Set off. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/collapse/set_off>.
Set off or Collapse. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/collapse/set_off.
Google Ngram Viewer shows how "collapse" and "set off" have occurred on timeline