Related by context. Frequent words. (Click for all words.) 73 Columbine High 68 Columbine 55 shooting spree 54 Dylan Klebold 53 shooting rampage 52 shootings 50 Klebold 49 massacre 48 gunman Seung Hui Cho 46 Seung Hui Cho 44 gunman 44 slayings 44 sniper shootings 42 murderous rampage 42 Megan Meier 41 Unabomber 41 lone gunman 41 Loughner 40 rampage 40 Lee Loughner 40 Jared Loughner 40 cyberbullying 39 Weise 39 murders 39 fatal shootings 39 Cho Seung Hui 38 serial killings 38 Kazmierczak 38 Beslan 38 shooting 37 serial killer 37 committing suicide 37 Dru Sjodin 37 Talovic 37 killings 37 slaying 37 Kretschmer 37 JonBenet Ramsey 37 stabbings 37 assassination 36 sniper spree 36 massacres 36 stabbing spree 36 Robida 36 cyber bullying 36 terrorist attacks 36 serial killers 36 Massacre 36 pedophiles 36 Sheriff Clarence Dupnik 36 Schallenberger 36 serial rapist 36 anthrax mailings 36 white supremacists 36 Baseline Killer 36 Hrant Dink 35 LITTLETON Colo. 35 JonBenet 35 suicide hijackings 35 Congresswoman Gabrielle Giffords 35 Maurice Clemmons 35 Dupnik 35 Gunman 35 shooter 35 mentally disturbed 35 Phoebe Prince 34 white supremacist 34 Cossey 34 Shootings 34 Shooter 34 Holocaust 34 classmates 34 rampages 34 Virginia Tech 34 Rwandan genocide 34 JFK assassination 34 Dunblane 34 middle schooler 34 Shasta Groene 34 Freddy Krueger 34 Serial Shooter 34 murder 34 Rwanda genocide 34 Erfurt 33 Sjodin 33 Benke 33 Matthew Shepard 33 hostage standoff 33 schoolyard 33 racial tensions 33 Balloon Boy 33 bomb blasts 33 Derrick Bird 33 lockdowns 33 concealed carry 33 BTK 33 schoolmates 33 murdered 33 molestations 33 fatal stabbing 33 Morva