| A | B |
| facilitate | to make easy; to help bring about |
| fallacy | false idea; mistaken belief |
| fastidious | hard to please; dainty in taste |
| fervor | intense emotion; great warmth of feeling |
| fitful | spasmodic; intermittent |
| flagrant | outrageous; glaringly offensive |
| fledgling (adjective) | newly developed; little known |
| fledgling (noun) | a young bird or an inexperienced person |
| forlorn | deserted; left alone and neglected; unhappy |
| formidable | hard to overcome; to be dreaded |
| fortuitous | happening by chance |