Scattergories Duplicate Answers
The rules are not exactly clear on the definition of duplicate, so it is truly up to the players as a group to decide.

In my experience, if they refer to the same thing, they are considered duplicates, in your example as the "Jacksonville Jaguars" and "Jaguars" are the same team, they should be considered duplicate answers. This encourages thinking out of the box and looking for less common answers, that's the fun of the game after all.