| eructation | (noun) a reflex that expels gas noisily from the stomach through the mouth | Synonyms: belch, belching, burp, burping |
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| (noun) (of volcanoes) pouring out fumes or lava (or a deposit so formed) | Synonyms: eruption, extravasation |
| eruditeness | (noun) profound scholarly knowledge | Synonyms: encyclopaedism, encyclopedism, erudition, learnedness, learning, scholarship |
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| erudition | (noun) profound scholarly knowledge | Synonyms: encyclopaedism, encyclopedism, eruditeness, learnedness, learning, scholarship |
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| eruption | (noun) the sudden occurrence of a violent discharge of steam and volcanic material | Synonyms: volcanic eruption |
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| (noun) a sudden very loud noise | Synonyms: bam, bang, blast, clap |
| (noun) the emergence of a tooth as it breaks through the gum | - |
| (noun) a sudden violent spontaneous occurrence (usually of some undesirable condition) | Synonyms: irruption, outbreak |
| (noun) (of volcanoes) pouring out fumes or lava (or a deposit so formed) | Synonyms: eructation, extravasation |
| (noun) symptom consisting of a breaking out and becoming visible | - |
| estrus | (noun) applies to nonhuman mammals: a state or period of heightened sexual arousal and activity | Synonyms: heat, oestrus, rut |
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| excruciation | (noun) the infliction of extremely painful punishment or suffering | Synonyms: crucifixion |
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| (noun) a state of acute pain | Synonyms: agony, suffering |
| extrusion | (noun) squeezing out by applying pressure | Synonyms: expulsion |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
| ferrule | (noun) a metal cap or band placed on a wooden pole to prevent splitting | Synonyms: collet |
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| ferule | (noun) a switch (a stick or cane or flat paddle) used to punish children | - |
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| filovirus | (noun) animal viruses belonging to the family Filoviridae | - |
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| flavivirus | (noun) animal viruses belonging to the family Flaviviridae | - |
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| forerunner | (noun) something that precedes and indicates the approach of something or someone | Synonyms: harbinger, herald, precursor, predecessor |
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| (noun) a person who goes before or announces the coming of another | Synonyms: precursor |
| (noun) anything that precedes something similar in time | Synonyms: antecedent |
| forum | (noun) a public facility to meet for open discussion | Synonyms: assembly, meeting place |
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| (noun) a public meeting or assembly for open discussion | - |
| fructification | (noun) organs of fruiting (especially the reproductive parts of ferns and mosses) | - |
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| (noun) the bearing of fruit | - |
| fructose | (noun) a simple sugar found in honey and in many ripe fruits | Synonyms: fruit sugar, laevulose, levulose |
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| fructosuria | (noun) the presence of levulose is the urine | - |
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| frugality | (noun) prudence in avoiding waste | Synonyms: frugalness |
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| frugalness | (noun) prudence in avoiding waste | Synonyms: frugality |
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| fruit | (noun) an amount of a product | Synonyms: yield |
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| (noun) the consequence of some effort or action | - |
| (noun) the ripened reproductive body of a seed plant | - |
| fruitage | (noun) the yield of fruit | - |
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| fruitcake | (noun) a rich cake containing dried fruit and nuts and citrus peel and so on | - |
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| (noun) a whimsically eccentric person | Synonyms: crackpot, crank, nut, nut case, screwball |
| fruiterer | (noun) a person who sells fruit | - |
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| fruitfulness | (noun) the quality of something that causes or assists healthy growth | Synonyms: fecundity |
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| (noun) the intellectual productivity of a creative imagination | Synonyms: fecundity |
| fruition | (noun) something that is made real or concrete | Synonyms: realisation, realization |
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| (noun) enjoyment derived from use or possession | - |
| (noun) the condition of bearing fruit | - |
| fruitlessness | (noun) the quality of yielding nothing of value | Synonyms: aridity, barrenness |
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| (noun) a lack of creative imagination | - |
| fruitlet | (noun) a diminutive fruit, especially one that is part of a multiple fruit | - |
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| fruitwood | (noun) wood of various fruit trees (as apple or cherry or pear) used especially in cabinetwork | - |
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| frumenty | (noun) sweet spiced porridge made from hulled wheat | - |
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| frump | (noun) a dull unattractive unpleasant girl or woman | Synonyms: dog |
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| frustration | (noun) an act of hindering someone's plans or efforts | Synonyms: foiling, thwarting |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: defeat |
| (noun) a feeling of annoyance at being hindered or criticized | - |
| frustum | (noun) a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed | - |
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| fulcrum | (noun) the pivot about which a lever turns | - |
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| funrun | (noun) a footrace run for fun (often including runners who are sponsored for a charity) | Synonyms: fun run |
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| furuncle | (noun) a painful sore with a hard core filled with pus | Synonyms: boil |
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| furunculosis | (noun) acute skin disease characterized by the presence of many furuncles | - |
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| garrulity | (noun) the quality of being wordy and talkative | Synonyms: garrulousness, loquaciousness, loquacity, talkativeness |
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| garrulousness | (noun) the quality of being wordy and talkative | Synonyms: garrulity, loquaciousness, loquacity, talkativeness |
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| gastrula | (noun) double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm | - |
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| gastrulation | (noun) the process in which a gastrula develops from a blastula by the inward migration of cells | - |
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| gerund | (noun) a noun formed from a verb (such as the `-ing' form of an English verb when used as a noun) | - |
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| glomerule | (noun) a compacted or sessile cyme | - |
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| glomerulonephritis | (noun) nephritis marked by inflammation of the glomeruli of the kidney; characterized by decreased production of urine and by the presence of blood and protein in the urine and by edema | - |
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| glomerulus | (noun) a small intertwined group of capillaries in the malpighian body; it filters the blood during urine formation | - |
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| grapefruit | (noun) large yellow fruit with somewhat acid juicy pulp; usual serving consists of a half | - |
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| (noun) citrus tree bearing large round edible fruit having a thick yellow rind and juicy somewhat acid pulp | Synonyms: Citrus paradisi |
| grub | (noun) a soft thick wormlike larva of certain beetles and other insects | - |
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| (noun) informal terms for a meal | Synonyms: chow, chuck, eats |
| grubbiness | (noun) the state of being grimy | Synonyms: griminess |
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| grubby | (noun) small sculpin of the coast of New England | Synonyms: Myxocephalus aenaeus |
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| grubstake | (noun) funds advanced to a prospector or to someone starting a business in return for a share of the profits | - |
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| grudge | (noun) a resentment strong enough to justify retaliation | Synonyms: grievance, score |
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| gruel | (noun) a thin porridge (usually oatmeal or cornmeal) | - |
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| gruesomeness | (noun) the quality of being ghastly | Synonyms: ghastliness, grimness, luridness |
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| gruffness | (noun) a throaty harshness | Synonyms: hoarseness, huskiness |
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| (noun) an abrupt discourteous manner | Synonyms: abruptness, brusqueness, curtness, shortness |
| grugru | (noun) tropical American feather palm having a swollen spiny trunk and edible nuts | Synonyms: Acrocomia aculeata, gri-gri, grugru palm, macamba |
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| grumble | (noun) a complaint uttered in a low and indistinct tone | Synonyms: grumbling, murmur, murmuring, mutter, muttering |
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| (noun) a loud low dull continuous noise | Synonyms: grumbling, rumble, rumbling |
| grumbler | (noun) a person given to excessive complaints and crying and whining | Synonyms: bellyacher, complainer, crybaby, moaner, sniveller, squawker, whiner |
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| grumbling | (noun) a complaint uttered in a low and indistinct tone | Synonyms: grumble, murmur, murmuring, mutter, muttering |
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| (noun) a loud low dull continuous noise | Synonyms: grumble, rumble, rumbling |
| grume | (noun) a semisolid mass of coagulated red and white blood cells | Synonyms: blood clot |
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| (noun) a thick viscous liquid | - |
| grummet | (noun) fastener consisting of a metal ring for lining a small hole to permit the attachment of cords or lines | Synonyms: cringle, eyelet, grommet, loop |
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| grump | (noun) a bad-tempered person | Synonyms: churl, crank, crosspatch, grouch |
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| grumpiness | (noun) a fussy and eccentric disposition | Synonyms: contrariness, crankiness, crotchetiness |
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| grunge | (noun) anything regarded as making something unclean | Synonyms: dirt, filth, grease, grime, soil, stain |
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| grunt | (noun) medium-sized tropical marine food fishes that utter grunting sounds when caught | - |
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| (noun) the short low gruff noise of the kind made by hogs | Synonyms: oink |
| (noun) an unskilled or low-ranking soldier or other worker | - |
| grunter | (noun) domestic swine | Synonyms: hog, pig, squealer, Sus scrofa |
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| (noun) a person who grunts | - |
| gunrunner | (noun) a smuggler of guns | Synonyms: arms-runner |
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| gunrunning | (noun) the smuggling of guns and ammunition into a country secretly and illegally | - |
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| guru | (noun) a Hindu or Buddhist religious leader and spiritual teacher | - |
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| (noun) a recognized leader in some field or of some movement | - |
| gyrus | (noun) a convex fold or elevation in the surface of the brain | Synonyms: convolution |
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| hadrosaurus | (noun) any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic | Synonyms: duck-billed dinosaur, hadrosaur |
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| hairbrush | (noun) a brush used to groom a person's hair | - |
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| hearthrug | (noun) a rug spread out in front of a fireplace | - |
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| hepadnavirus | (noun) a group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humans | - |
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| herrerasaurus | (noun) a kind of theropod dinosaur found in Argentina | Synonyms: herrerasaur |
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| hippeastrum | (noun) amaryllis of tropical America often cultivated as a houseplant for its showy white to red flowers | Synonyms: Hippeastrum puniceum |
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| hirudinean | (noun) carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end | Synonyms: bloodsucker, leech |
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| humdrum | (noun) the quality of wearisome constancy, routine, and lack of variety | Synonyms: monotony, sameness |
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| humerus | (noun) bone extending from the shoulder to the elbow | - |
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| hydrargyrum | (noun) a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures | Synonyms: atomic number 80, Hg, mercury, quicksilver |
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| hyperbilirubinemia | (noun) abnormally high amounts of bile pigment (bilirubin) in the blood | - |
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| ichthyosaurus | (noun) ichthyosaurs of the Jurassic | - |
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| icterus | (noun) yellowing of the skin and the whites of the eyes caused by an accumulation of bile pigment (bilirubin) in the blood; can be a symptom of gallstones or liver infection or anemia | Synonyms: jaundice |
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| imprudence | (noun) a lack of caution in practical affairs | - |
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| incongruity | (noun) the quality of disagreeing; being unsuitable and inappropriate | Synonyms: incongruousness |
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| incongruousness | (noun) the quality of disagreeing; being unsuitable and inappropriate | Synonyms: incongruity |
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| incorruptibility | (noun) the incapability of being corrupted | - |
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| incorruption | (noun) characterized by integrity or probity | Synonyms: incorruptness |
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| incorruptness | (noun) characterized by integrity or probity | Synonyms: incorruption |
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| incrustation | (noun) a decorative coating of contrasting material that is applied to a surface as an inlay or overlay | Synonyms: encrustation |
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| (noun) a hard outer layer that covers something | Synonyms: crust, encrustation |
| (noun) the formation of a crust | Synonyms: encrustation |
| indecorum | (noun) an act of undue intimacy | Synonyms: familiarity, impropriety, liberty |
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| (noun) a lack of decorum | Synonyms: indecorousness |
| indestructibility | (noun) the strength to resist destruction | - |
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| infrastructure | (noun) the stock of basic facilities and capital equipment needed for the functioning of a country or area | Synonyms: base |
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| (noun) the basic structure or features of a system or organization | Synonyms: substructure |
| infructescence | (noun) the fruiting stage of the inflorescence | - |
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| inrush | (noun) an inflow | Synonyms: inpour, inpouring |
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| inscrutability | (noun) the quality of being impossible to investigate | - |
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| instruction | (noun) the profession of a teacher | Synonyms: pedagogy, teaching |
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| (noun) the activities of educating or instructing; activities that impart knowledge or skill | Synonyms: didactics, education, educational activity, pedagogy, teaching |
| (noun) (computer science) a line of code written as part of a computer program | Synonyms: command, program line, statement |
| (noun) a message describing how something is to be done | Synonyms: direction |
| instructions | (noun) a manual usually accompanying a technical device and explaining how to install or operate it | Synonyms: book of instructions, instruction manual, operating instructions |
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| instructor | (noun) a person whose occupation is teaching | Synonyms: teacher |
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| instructorship | (noun) the position of instructor | - |
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| instructress | (noun) a woman instructor | - |
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| instrument | (noun) the means whereby some act is accomplished | Synonyms: tool |
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| (noun) a device that requires skill for proper use | - |
| (noun) any of various devices or contrivances that can be used to produce musical tones or sounds | Synonyms: musical instrument |
| (noun) (law) a document that states some contractual relationship or grants some right | Synonyms: legal document, legal instrument, official document |
| (noun) the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process | Synonyms: instrumental role |
| (noun) a person used by another to gain an end | Synonyms: cat's-paw, pawn |
| instrumentalism | (noun) a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success | - |
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