co-existent (adjective) coexistent: contemporary
Sinonime: adulteration,
atrophy,
blight, caries,
consumption, corrosion, crumbling,
decadence,
decline, decomposition,
decrease, decrepitude, degeneracy, degeneration, depreciation,
deterioration, dilapidation, disintegration, disrepair,
dissolution,
downfall,
dying, extinction, fading,
failing, gangrene, impairment,
mortification, perishing, putrefaction, putrescence, putridity, putridness,
rot, rotting,
ruin, ruination, rust, senescence, spoilage, spoilation, wasting, wasting away, withering
Antonime: development,
flourish, germination,
growth,
improvement, ripening,
strength, strengthening