| Term | Definition |
| flippant | lacking proper seriousness |
| florid | ruddy; reddish; flowery |
| fluctuate | wave; shift |
| foolhardy | rash; heedless |
| foresight | ability to foresee future happenings; prudence |
| forestall | prevent by taking action in advance |
| forsake | desert; abandon; renounce |
| forthright | outspoken; frank |
| fortuitous | accidental; by chance |
| foster | rear; encourage; nurture |
| founder | fail completely; sink |
| founder | person who establishes (an organization, business) |
| frail | weak |
| frivolous | lacking in seriousness; self-indulgently carefree; relatively unimportant |
| frugality | thrift; economy |
| fundamental | basic; primary; essential |
| furtive | stealthy; sneaky |
| futile | ineffective; fruitless |
| galvanize | stimulate by shock; stir up; revitalize |
| garbled | mixed up; jumbled; distorted |
| garrulous | loquacious; wordy; talkative |
| genre | particular variety of art or literature |
| germane | pertinent; bearing upon the case at hand |
| glacial | like a glacier; extremely cold |
| glib | fluent; facile; slick |
| glutton | someone who eats too much; greedy person |
| gorge | small, steep-walled canyon |
| grandiose | pretentious; high-flown; ridiculously exaggerated; impressive |
| gratify | please |
| gratuitous | given freely; unwarranted; unprovoked |
| gravity | seriousness |
| gregarious | sociable |
| grievance | cause of complaint |
| grudging | unwilling; reluctant; stingy |
| guile | deceit; duplicity; wiliness; cunning |
| gullible | easily deceived |
| hackneyed | commonplace; trite |
| hallowed | blessed; consecrated |
| hamper | obstruct |
| harass | annoy by repeated attacks |
| hardy | sturdy; robust; able to stand inclement weather |
| haughtiness | pride; arrogance |
| hedonist | one who believes pleasure is the sole aim in life |
| heed | pay attention to; consider |
| heresy | opinion contrary to popular belief; opinion contrary to accepted religion |
| heterodox | unorthodox; unconventional |
| heterogeneous | dissimilar; mixed |
| heyday | time of greatest success; prime |
| hiatus | gap; interruption in duration or continuity; pause |
| hierarchy | arrangement by rank or standing; authoritarian body divided into ranks |
| hindrance | block; obstacle |
| hoard | stockpile; accumulate for future use |
| homogeneous | of the same kind |
| hone | sharpen |
| hostility | unfriendliness; hatred |
| humane | marked by kindness or consideration |
| husband | use sparingly; conserve; save |
| hyperbole | exaggeration; overstatement |
| hypocritical | pretending to be virtuous; deceiving |
| hypothetical | based on assumptions or hypotheses; supposed |