Flammable
Flammable adjective - Capable of catching or being set on fire.
Unstable and flammable are semantically related. in inflammable topic. In some cases you can use "Unstable" instead an adjective "Flammable".
Both words in one sentence
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If there's a chance to put something sharp/heavy/flammable/otherwise hazardous on a shaky or unstable surface, you can bet your ass they will.
Source: Film / Final Destination
Cite this Source
Unstable and Flammable. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/flammable/unstable
Flammable & Unstable. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/flammable/unstable>.
Unstable or Flammable. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/flammable/unstable.
Google Ngram Viewer shows how "flammable" and "unstable" have occurred on timeline