| Term | Definition |
| fetid | having an offensive smell; stinking |
| fiasco | a complete failure |
| flaccid | soft and flabby |
| flagitious | grossly wicked; villainous |
| flagrant | shocking |
| flail | to strike or swing |
| flamboyant | showy; highly elaborate |
| flaunt | to show off |
| florid | rosy-colored; ornate |
| foible | a minor weakness |
| foment | whip up; arouse |
| font | basin |
| forensic | used in legal processing or public debate |
| formidable | huge; dreadful |
| forte (german) | strong point |
| forte (latin) | loud |
| fortitude | courage |
| fortuitous | fortunate; happening by chance |
| fraternize | to associate in brotherly manner |
| fray | noisy quarrel; to unravel |
| frugal | thrifty |
| fulmination | violent explosion |
| fulsome | disgusting |
| furtive | stealthy |
| gambol | to romp; frolic |
| gamut | an entire range |
| garble | to distort |
| garrulous | talkative |
| gauntlet | a severe trial/ordeal; medieval glove |
| germane | related; fitting |
| gibe | to scoff; jeer |
| gird | to encircle |
| glib | fluent; smooth |
| goad | to spur or urge |
| gradient | slope |
| gratuitous | free; without justification |
| gregarious | sociable; enjoys company of others |
| grist | grain to be ground/ already ground |
| grueling | exhausting |
| guild | union |
| halcyon | calm; peaceful |
| hale | healthy |
| hallow | to make holy |
| hapless | unfortunate |
| harangue | long speech |
| harass | to annoy continuously with repeated attacks |
| harbinger | omen |
| hearth | the floor of a fireplace; home |
| heinous | hateful |
| herbivore | feeding on plants |