Hermione therefore removed the enchantments she had placed around the clearing, while Harry and Ron obliterated all the marks and impressions on the ground that might show they had camped there.
It was Umbridge’s lie that brought the blood surging into Harry’s brain and obliterated his sense of caution — that the locket she had taken as a bribe from a petty criminal was being used to bolster her own pure-blood credentials.
…it coiled itself around his torso, squeezing the air from him, pressing the Horcrux hard into his chest, a circle of ice that throbbed with life, inches from his own frantic heart, and his brain was flooding with cold, white light, all thought obliterated, his own breath drowned, distant footsteps, everything going… A metal heart was banging outside his chest, and now he was flying, flying with triumph in his heart, without need of broomstick or thestral… He was abruptly awake in the…
There are no more uses of "obliterate" in the book.
Show samples from other sources
Hillary Clinton warned Iran that the U.S. could obliterate them if they were foolish enough to attack Israel.
13 was said to have been obliterated in the war between the Capitol and the districts