I checked both "aggro" and "hate", as I use them for different instances.
"Aggro" is enmity you did not intend/were supposed to build. ("Damn Sapsa Spawning Grounds, I always get aggro from every single monster I pass by.")
"Hate" is enmity you or someone else did intend/are supposed to build ("Tank, are you AFK? I got hate and you're just standing there.")