| american football | 9 |
| college football | 4 |
| canadian football | 2 |
| professional football | 2 |
| association football | 1 |
| gaelic football | 1 |
| the air | 0.30 |
| original factory box | 0.28 |
| flight | 0.25 |
| the top of the game | 0.16 |
| crossroad | 0.16 |
| be a team game | 0.64 |
| be a game of opinions | 0.51 |
| pick up line | 0.51 |
| remain on espn | 0.50 |
| make concussion | 0.44 |
| look different | 0.41 |
| refer to a number of sp… | 0.41 |
| play part | 0.39 |
| do the talking | 0.38 |
| provide some relief | 0.38 |
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| cte | 0.29 |
| serious risk | 0.16 |
| head injuries | 0.16 |
| the power | 0.38 |
| only two choices | 0.34 |
| rule | 0.31 |
| long history | 0.30 |
| more money | 0.25 |
| circa | 0.25 |
| cell phones | 0.25 |
| positive impact | 0.22 |
| universal appeal | 0.22 |
| fan | 0.22 |
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| hard work | 0.33 |
| quick thinking | 0.31 |
| tremendous amount of en… | 0.28 |
| quick reflexes | 0.28 |
| great agility | 0.25 |
| serious injuries | 0.16 |
| game | 0.75 |
| sport | 0.74 |
| the most popular sport | 0.69 |
| a team sport | 0.55 |
| simple game | 0.54 |
| beautiful game | 0.54 |
| emotional sport | 0.52 |
| physical sport | 0.49 |
| a numbers game | 0.46 |
| rough sport | 0.44 |
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| cowhide | 0.42 |
| leather | 0.36 |
| foam | 0.25 |
| rubber material | 0.24 |
| played | 0.62 |
| covered | 0.52 |
| played with foot | 0.50 |
| used by the patriots | 0.49 |
| played in england | 0.47 |
| inflated | 0.46 |
| used in the super bowl | 0.44 |
| deflated | 0.44 |
| followed by basketball | 0.42 |
| thrown | 0.41 |
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| political messages | 0.16 |