nil, absence, nothingness, nonexistence.

decease, release, parting, ending, quietus, cessation, end, expiration, dissolution, passing, annihilation, demise, fatality, death.

wreckage, murder, into/out of thin air, extirpation, curtain, quenching, loss, eradication, experimental extinction, mincemeat, help, destruction, obliteration, abolition, demolition, away, decimation, stifling, dissipation, extermination, into thin air, desolation, disappearing act, wastage, make, liquidation, havoc, demolishment, devastation, disappearance, defunctness, live, ruination, extinguishment, ruin, extirpation, rest, extinguishing.

Among the fatal effects of this has been the extinction of rational piety and rational patriotism. - "Castilian Days", John Hay.

I contemplate its extinction with equanimity. - "A Journal of Impressions in Belgium", May Sinclair.

Is it total extinction? - "Robert Browning", Edward Dowden.

experimental extinction, mineral extraction, extension, telephone extension, extension agent, extension phone, extension service, extermination, racial extermination, cartridge extractor.