| Term | Definition |
| facetious | not meant to be taken seriously or literally; amusing; humorous; lacking serious intent; concerned with something nonessential, amusing, or frivolous |
| factious | dissenting (especially dissenting with the majority opinion);Of, relating to, produced by, or characterized by internal dissension |
| factitious | not spontaneous or natural; artificial; contrived; made or manufactured |
| fatuous | foolish or inane, esp. in an unconscious, complacent manner; unreal; illusory |
| feckless | ineffective; incompetent; futile; having no sense of responsibility; indifferent; lazy |
| fiduciary | a person to whom property or power is entrusted for the benefit of another; of, based on, or in the nature of trust and confidence, as in public affairs |
| filibuster | an irregular military adventurer, esp. one who engages in an unauthorized military expedition into a foreign country to foment or support a revolution; the use of obstructive tactics (such as exceptionally long speeches) by a member of a legislative assembly to prevent the adoption of a measure generally favored or to force a decision against the will of the majority; to impede (legislation) by irregular or obstructive tactics, esp. by making long speeches |
| forensic | pertaining to, connected with, or used in courts of law or public discussion and debate; adapted or suited to argumentation; rhetorical; the art or study of argumentation and formal debate |
| fractious | refractory or unruly; readily angered; peevish; irritable; quarrelsome |
| fusty | having a stale smell; moldy; musty; old-fashioned or out-of-date, as architecture, furnishings, or the like; stubbornly conservative or old-fashioned; fogeyish |
| fecundity | capacity, esp. in female animals, of producing young in great numbers; fruitfulness or fertility, as of the earth; the capacity of abundant production |
| gauche | lacking social grace, sensitivity, or acuteness; awkward; crude; tactless |
| gossamer | a fine, filmy cobweb seen on grass or bushes or floating in the air in calm weather, esp. in autumn; a thread or a web of this substance; an extremely delicate variety of gauze, used esp. for veils; a thin, waterproof outer garment, esp. for women] |
| gerrymander | the dividing of a state, county, etc., into election districts so as to give one political party a majority in many districts while concentrating the voting strength of the other party into as few districts as possible; |
| guile | insidious cunning in attaining a goal; crafty or artful deception; duplicity. |
| glossolalia | incomprehensible speech in an imaginary language, sometimes occurring in a trance state, an episode of religious ecstasy, or schizophrenia |