Related by context. Frequent words. (Click for all words.) 74 Columbine 65 Dylan Klebold 56 Klebold 50 shooting rampage 48 shooting spree 48 Seung Hui Cho 44 shootings 44 Loughner 42 Weise 41 Virginia Tech 41 Littleton Colo. 40 Beslan 40 Jared Loughner 39 Lee Loughner 39 Arvada 39 Crandon 38 Fort Hood 38 cyberbullying 38 Littleton 37 Cho Seung Hui 37 Arapahoe County 37 Harvey Milk 36 massacre 36 Penley 36 Dunblane 36 Mayerthorpe 36 Matthew Shepard 36 Prevent Gun Violence 36 Unabomber 36 room schoolhouse 35 Odgren 35 JonBenet Ramsey 35 sniper shootings 35 concealed carry 35 Sjodin 35 Megan Meier 35 Boulder 35 Blanning 35 Dupnik 35 rampage 35 gunman 35 Maurice Clemmons 35 Cherry Creek 34 cyber bullying 34 concealed weapons 34 John Hickenlooper 34 Arapahoe 34 Hinckley 34 Phoebe Prince 34 Kazmierczak 34 George Tiller 34 Holocaust Memorial 34 Bill Ritter 34 GLSEN 33 Hainstock 33 Tyler Clementi 33 Congresswoman Gabrielle Giffords 33 terrorist attacks 33 Jeffco 33 Derrick Bird 33 Giffords 33 Mauser 33 Holocaust 33 Darrent Williams 33 Vail Mountain 33 Rep. Gabrielle Giffords 33 yearbook 33 Morva 33 Robida 33 handguns 33 Colorado Springs 33 moderate Hutus 33 Bruce Ivins 33 Colorado 33 Garfield 32 Basalt 32 7NEWS 32 classmates 32 lone gunman 32 Hengel 32 Malvo 32 Fort Collins 32 hijacked planes 32 Hickenlooper 32 bullying 32 postelection violence 32 Blacksburg 32 Eveleth 32 Ivins 32 Nazi Holocaust 32 Poudre 32 Tutsis 32 spokeswoman Monique Bond 32 Coors Field 32 JonBenet 32 Fort Hood Texas 32 powered rifle 32 Alfred P. Murrah 31 prairie dogs 31 Michael Bennet 31 Ward Churchill