| A | B |
| fluctuate | shift back and forth uncertainly |
| foliage | cluster of leaves or flowers |
| fanatic | one extremely devoted to a cause or idea |
| fortuitous | occuring by chance or accident |
| forte | something in which a person excells |
| fauna | animals in a specific region |
| fabrication | lie; to make something up |
| frugal | careful with money |
| facilitate | to make easier; help bring about |
| fallacy | false belief or idea |
| facsimile | imitation; reproduction |
| fidelity | faithfulness; loyalty |
| finis | end or conclusion |