mass extinction

noun 0.840

extinction

noun 0.832

interstellar extinction

noun 0.667

speciation event

noun 0.652

extermination

noun 0.627

endangered species

noun 0.606

end of the world

noun 0.599

world ending

noun 0.598

extinguishing

noun 0.589

climate catastrophe

noun 0.572

natural disaster

noun 0.565

expiration

noun 0.560

event

noun 0.558

apocalypse

noun 0.558

annihilation

noun 0.555

cataclysm

noun 0.552

catastrophe

noun 0.547

ecocide

noun 0.536

armageddon

noun 0.533

doomsday

noun 0.532

ice age

noun 0.529

epoch

noun 0.527

eclipse

noun 0.526

event horizon

noun 0.519

eruption

noun 0.519

eradication

noun 0.517

nonevent

noun 0.513

disaster

noun 0.512

expiry

noun 0.511

solar eclipse

noun 0.510

explosion

noun 0.510

speciation

noun 0.509

extinguisher

noun 0.508

macroevolution

noun 0.507

termination shock

noun 0.506

death

noun 0.503