absorption, scattering

extirpation, species, annihilation, oblivion, overexploitation, endangered species, endangered, demise, predation, decimation, megafauna, starvation, extermination, inbreeding, dodo, irrelevance, ursus arctos horribilis, pygmy chimpanzee, aquatic mammal, canis lupus, overfishing, elkhorn, subspecies, obliteration, eastern lowland gorilla, obsolescence, depletion, amphibians, irrelevancy, deglaciation, interbreeding, passenger pigeon, habitat, ursus maritimus, woodland caribou, apocalypse, cartilaginous fish, ursus, overpopulation, homo sapiens, populations, solenodon, deforestation, saiga, storm petrel, reintroduction, pacific walrus, little brown myotis, insolvency, biodiversity, common murre, domestication, chestnut blight, threatened species, cataclysm, disintegration, vanishing, murrelet, common scoter, pika, desertification, hawaiian honeycreeper, endemism, canids, wood stork, oligocene epoch, quoll, haliaeetus, elimination, civilization, shortfin mako, woodlark, speciation, panthera tigris, auk, tuataras, golden plover, conservationists, ruination, vaquita, stegodon, caretta, abyss, ecosystems, barnacle goose, caecilians, honeycreepers, pan troglodytes, mammuthus, lechwe, eastern meadowlark, dunlin, recolonization, mammals, mammoths, galapagos islands, sacred ibis, yosemite toad, thunnus thynnus, klipspringer, eider duck, homo erectus, dissolution, dismemberment, downfall, disappearance, overthrow, collapse, destruction, liquidation, exhaustion, undoing, abolition, bankruptcy, dismantling, expulsion, liberation, abdication, breakdown, stimulation, retention, saturation, activation, relaxation, retest, shock, arousal, induction, interaction, irradiation, orientation, absorption, inhibition, interference, response, treatment, correlation, coupling, diffusion

blackout, black rhinoceros, brownout, conjectural, diceros bicornis, dimout, done forp, endangered, endangered species, enlightenment, nirvana, ruined, sunk, undone, washed-up

acquisition, action, activity, annihilation, conclusion, death, disintegration, ending, inaction, inactiveness, inactivity, learning, natural action, natural process, termination

defunctness, experimental extinction, extermination, extinguishing, quenching