| A | B |
| exuberance | overflowing abudance; joyful |
| fallacious | false; misleading |
| fanaticism | excessive zeal; extreme devotion to a belief or cause |
| fastidious | difficult to please; squeamish |
| fervor | glowing ardor; intensity of feeling |
| flagrant | conspicuously wicked; blatant |
| frivolous | lacking seriousness; self-indulgently carefree; relatively unimportant |
| frugality | thrift; economical; frugal |
| furtive | stealthy; sneaky |