Synonyms for Extinction (same or very similar meaning)
WordNet sense 1 (no longer in existence):
defunctness
WordNet sense 2 (complete annihilation):
extermination
WordNet sense 3 (a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus):
experimental extinction
WordNet sense 4 (the act of extinguishing; causing to stop burning):
extinguishing, quenching
From the ODE community, based on WordNet
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