epicenter(AmE), epicentre(BrE) - the point on the Earth's surface directly above the focus of an earthquake. / (figuratively) The focal point of any activity, especially if dangerous or destructive .

aggression / invasion / raid

close friend, bosom buddy / crony, chum

an accident resulting in a personal injury or death; often a traffic injury

serious, deep, heavy (topic), profound (change), weighty (matter)

application; request

(rare) an albatross, especially the short-tailed albatross (Phoebastria albatrus)

sinfonietta

ringtone

great disaster resulting from an earthquake