sword of damocles(n = noun.state) - a constant and imminent peril; "the possibility hangs over their heads like the sword of Damocles"
is a kind of endangerment, hazard, jeopardy, peril, risk

N  pitfall, rocks, reefs, coral reef, sunken rocks, snags, sands, quicksands, syrt, syrtis, Goodwin sands, sandy foundation, slippery ground, breakers, shoals, shallows, bank, shelf, flat, lee shore, ironbound coast, rock ahead, breakers ahead, precipice, maelstrom, volcano, ambush, pitfall, trapdoor, trap, sword of Damocles, wolf at the door, snake in the grass, death in the pot, latency, ugly customer, dangerous person, le chat qui dort, firebrand, hornet's nest, latet anquis in herba, proximus ardet Ucalegon.

australian sword lily, bearer of the sword, cavalry sword, damocles, fencing sword, sword, sword bean, sword cane, sword dance, sword dancing, sword fern, sword grass, sword knot, sword lily, sword side, sword stick, toothed sword fern