| fernlike | (adjective) resembling ferns especially in leaf shape | Synonyms: ferny |
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| ferny | (adjective) abounding in or covered with ferns | Synonyms: ferned |
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| (adjective) resembling ferns especially in leaf shape | Synonyms: fernlike |
| ferocious | (adjective) marked by extreme and violent energy | Synonyms: fierce, furious, savage |
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| ferociously | (adverb) in a physically fierce manner | Synonyms: fiercely |
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| ferociousness | (noun) the trait of extreme cruelty | Synonyms: brutality, savagery, viciousness |
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| ferocity | (noun) the property of being wild or turbulent | Synonyms: fierceness, furiousness, fury, vehemence, violence, wildness |
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| ferret | (noun) domesticated albino variety of the European polecat bred for hunting rats and rabbits | - |
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| (noun) musteline mammal of prairie regions of United States; nearly extinct | Synonyms: black-footed ferret, Mustela nigripes |
| (verb) search and discover through persistent investigation | Synonyms: ferret out |
| (verb) hunt with ferrets | - |
| (verb) hound or harry relentlessly | - |
| ferric | (adjective) of or relating to or containing iron | Synonyms: ferrous |
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| ferricyanide | (noun) salt of ferricyanic acid obtained by oxidation of a ferrocyanide | - |
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| ferrimagnetism | (noun) a phenomenon in ferrites where there can be incomplete cancellation of antiferromagnetic arranged spins giving a net magnetic moment | - |
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| ferrite | (noun) a solid solution in which alpha iron is the solvent | - |
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| (noun) a magnetic allotrope of iron; stable below 906 degrees centigrade | Synonyms: alpha-Fe, alpha-ferrite |
| ferritin | (noun) a protein containing 20% iron that is found in the intestines and liver and spleen; it is one of the chief forms in which iron is stored in the body | - |
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| ferrocerium | (noun) a pyrophoric alloy of iron with cerium; used for lighter flints | - |
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| ferroconcrete | (noun) concrete with metal and/or mesh added to provide extra support against stresses | Synonyms: reinforced concrete |
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| ferrocyanide | (noun) salt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate | - |
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| ferromagnet | (noun) any material that has ferromagnetic properties. | - |
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| ferromagnetic | (adjective) relating to or demonstrating ferromagnetism | - |
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| ferromagnetism | (noun) phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed | - |
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| ferrous | (adjective) of or relating to or containing iron | Synonyms: ferric |
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| ferrule | (noun) a metal cap or band placed on a wooden pole to prevent splitting | Synonyms: collet |
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| ferry | (noun) transport by boat or aircraft | Synonyms: ferrying |
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| (noun) a boat that transports people or vehicles across a body of water and operates on a regular schedule | Synonyms: ferryboat |
| (verb) travel by ferry | - |
| (verb) transport by ferry | - |
| (verb) transport from one place to another | - |
| ferryboat | (noun) a boat that transports people or vehicles across a body of water and operates on a regular schedule | Synonyms: ferry |
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| ferrying | (noun) transport by boat or aircraft | Synonyms: ferry |
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| ferryman | (noun) a man who operates a ferry | - |
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| fertile | (adjective) capable of reproducing | - |
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| (adjective) marked by great fruitfulness | Synonyms: fat, productive, rich |
| (adjective) bearing in abundance especially offspring | Synonyms: prolific |
| (adjective) intellectually productive | Synonyms: fecund, prolific |
| fertilisation | (noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant | Synonyms: fecundation, fertilization, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fecundation, fertilization |
| fertilise | (verb) introduce semen into (a female) | Synonyms: fecundate, fertilize, inseminate |
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| (verb) provide with fertilizers or add nutrients to | Synonyms: feed, fertilize |
| (verb) make fertile or productive | Synonyms: fecundate, fertilize |
| fertiliser | (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile | Synonyms: fertilizer, plant food |
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| fertility | (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: prolificacy, rankness, richness |
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| (noun) the state of being fertile; capable of producing offspring | Synonyms: fecundity |
| (noun) the ratio of live births in an area to the population of that area; expressed per 1000 population per year | Synonyms: birth rate, birthrate, fertility rate, natality |
| fertilizable | (adjective) capable of being fertilized | - |
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| fertilization | (noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant | Synonyms: fecundation, fertilisation, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fecundation, fertilisation |
| fertilize | (verb) introduce semen into (a female) | Synonyms: fecundate, fertilise, inseminate |
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| (verb) provide with fertilizers or add nutrients to | Synonyms: feed, fertilise |
| (verb) make fertile or productive | Synonyms: fecundate, fertilise |
| fertilizer | (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile | Synonyms: fertiliser, plant food |
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| ferule | (noun) a switch (a stick or cane or flat paddle) used to punish children | - |
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| fervency | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervidness, fervor, fervour, fire |
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| fervent | (adjective) (archaic) extremely hot, burning, or glowing | Synonyms: fervid |
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| (adjective) characterized by intense emotion | Synonyms: ardent, fervid, fiery, impassioned, perfervid, torrid |
| fervently | (adverb) with passionate fervor | Synonyms: fervidly, fierily |
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| fervid | (adjective) (archaic) extremely hot, burning, or glowing | Synonyms: fervent |
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| (adjective) characterized by intense emotion | Synonyms: ardent, fervent, fiery, impassioned, perfervid, torrid |
| fervidly | (adverb) with passionate fervor | Synonyms: fervently, fierily |
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| fervidness | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervor, fervour, fire |
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| fervor | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervidness, fervour, fire |
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| (noun) the state of being emotionally aroused and worked up | Synonyms: excitation, excitement, fervour, inflammation |
| fervour | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervidness, fervor, fire |
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| (noun) the state of being emotionally aroused and worked up | Synonyms: excitation, excitement, fervor, inflammation |
| feryaz | (noun) a broad kaftan with long sleeves, worn by the nobility in Russia in the 16th and 17th centuries. | - |
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| foraminifer | (noun) marine microorganism having a calcareous shell with openings where pseudopods protrude | Synonyms: foram |
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| fossiliferous | (adjective) bearing or containing fossils | - |
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| gaffer | (noun) a person who exercises control over workers | Synonyms: boss, chief, foreman, honcho |
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| (noun) an elderly man | Synonyms: antique, old-timer, old geezer, oldtimer |
| (noun) an electrician responsible for lighting on a movie or tv set | - |
| gauffer | (noun) an ornamental frill made by pressing pleats | Synonyms: goffer |
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| (noun) an iron used to press pleats and ridges | Synonyms: gauffering iron, goffer, goffering iron |
| (verb) make wavy with a heated goffering iron | Synonyms: goffer |
| gemmiferous | (adjective) bearing or reproducing by a gemma | - |
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| gofer | (noun) an employee whose duties include running errands | - |
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| goffer | (noun) an ornamental frill made by pressing pleats | Synonyms: gauffer |
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| (noun) an iron used to press pleats and ridges | Synonyms: gauffer, gauffering iron, goffering iron |
| (noun) a zealously energetic person (especially a salesman) | Synonyms: gopher |
| (verb) make wavy with a heated goffering iron | Synonyms: gauffer |
| golfer | (noun) someone who plays the game of golf | Synonyms: golf player, linksman |
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| granuliferous | (adjective) producing or full of granules | - |
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| heifer | (noun) young cow | - |
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| hoofer | (noun) a professional dancer | Synonyms: stepper |
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| housewifery | (noun) the work of a housewife | - |
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| indifference | (noun) the trait of lacking enthusiasm for or interest in things generally | Synonyms: apathy, numbness, spiritlessness |
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| (noun) the trait of remaining calm and seeming not to care; a casual lack of concern | Synonyms: nonchalance, unconcern |
| (noun) unbiased impartial unconcern | - |
| (noun) apathy demonstrated by an absence of emotional reactions | Synonyms: emotionlessness, impassiveness, impassivity, phlegm, stolidity, unemotionality |
| indifferent | (adjective) (usually followed by `to') unwilling or refusing to pay heed | Synonyms: deaf |
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| (adjective) characterized by a lack of partiality | Synonyms: unbiased, unbiassed |
| (adjective) fairly poor to not very good | - |
| (adjective) neither too great nor too little | - |
| (adjective) being neither good nor bad | Synonyms: so-so |
| (adjective) showing no care or concern in attitude or action | - |
| (adjective) (often followed by `to') lacking importance; not mattering one way or the other | Synonyms: immaterial |
| (adjective) marked by a lack of interest | Synonyms: apathetic |
| (adjective) having only a limited ability to react chemically; chemically inactive | Synonyms: inert, neutral |
| (adjective) marked by no especial liking or dislike or preference for one thing over another | - |
| indifferently | (adverb) with indifference; in an indifferent manner | - |
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| infer | (verb) reason by deduction; establish by deduction | Synonyms: deduce, deduct, derive |
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| (verb) believe to be the case | Synonyms: understand |
| (verb) guess correctly; solve by guessing | Synonyms: guess |
| (verb) conclude by reasoning; in logic | Synonyms: deduce |
| (verb) draw from specific cases for more general cases | Synonyms: extrapolate, generalise, generalize |
| inference | (noun) the reasoning involved in drawing a conclusion or making a logical judgment on the basis of circumstantial evidence and prior conclusions rather than on the basis of direct observation | Synonyms: illation |
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| inferential | (adjective) relating to or having the nature of illation or inference | Synonyms: illative |
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| (adjective) derived or capable of being derived by inference | - |
| (adjective) based on interpretation; not directly expressed | - |
| (adjective) of reasoning; proceeding from general premisses to a necessary and specific conclusion | - |
| (adjective) resembling or dependent on or arrived at by inference | Synonyms: illative |
| inferior | (adjective) written or printed below and to one side of another character | Synonyms: subscript |
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| (adjective) of or characteristic of low rank or importance | - |
| (adjective) of low or inferior quality | - |
| (adjective) having an orbit between the sun and the Earth's orbit | - |
| (adjective) lower than a given reference point | - |
| (adjective) falling short of some prescribed norm | Synonyms: deficient, substandard |
| (noun) a character or symbol set or printed or written beneath or slightly below and to the side of another character | Synonyms: subscript |
| (noun) one of lesser rank or station or quality | - |
| inferiority | (noun) an inferior quality | Synonyms: low quality |
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| (noun) the quality of being a competitive disadvantage | Synonyms: unfavorable position |
| (noun) the state of being inferior | Synonyms: lower rank, lower status |
| infernal | (adjective) being of the underworld | - |
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| (adjective) characteristic of or resembling Hell | - |
| (adjective) of or pertaining to or characteristic of a very uncontrolled and intense fire | - |
| (adjective) expletives used informally as intensifiers | Synonyms: blame, blamed, blasted, blessed, damn, damned, darned, deuced, goddam, goddamn, goddamned |
| (adjective) extremely evil or cruel; expressive of cruelty or befitting hell | Synonyms: demonic, diabolic, diabolical, fiendish, hellish, satanic, unholy |
| (noun) an inhabitant of Hell | - |
| infernally | (adverb) diabolically | Synonyms: hellishly |
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| inferno | (noun) a very intense and uncontrolled fire | Synonyms: conflagration |
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| (noun) any place of pain and turmoil | Synonyms: hell, hell on earth, hellhole, snake pit, the pits |
| infertile | (adjective) incapable of reproducing | Synonyms: sterile, unfertile |
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| infertility | (noun) the state of being unable to produce offspring; in a woman it is an inability to conceive; in a man it is an inability to impregnate | Synonyms: sterility |
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| insufferable | (adjective) unbearably arrogant or conceited | - |
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| (adjective) too extreme to bear | Synonyms: unsufferable |
| insufferably | (adverb) in an extremely arrogant or conceited manner | - |
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| (adverb) to an insufferable degree | Synonyms: unsufferably |
| interfere | (verb) get involved, so as to alter or hinder an action, or through force or threat of force | Synonyms: interpose, intervene, step in |
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| (verb) come between so as to be hindrance or obstacle | - |
| interference | (noun) the act of hindering or obstructing or impeding | Synonyms: hinderance, hindrance |
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| (noun) (American football) blocking a player's path with your body | - |
| (noun) any obstruction that impedes or is burdensome | Synonyms: encumbrance, hinderance, hindrance, hitch, incumbrance, preventative, preventive |
| (noun) a policy of intervening in the affairs of other countries | Synonyms: intervention |
| (noun) electrical or acoustic activity that can disturb communication | Synonyms: disturbance, noise |
| interfering | (adjective) intrusive in a meddling or offensive manner | Synonyms: busy, busybodied, meddlesome, meddling, officious |
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| interferometer | (noun) any measuring instrument that uses interference patterns to make accurate measurements of waves | - |
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| interferon | (noun) an antiviral protein produced by cells that have been invaded by a virus; inhibits replication of the virus | - |
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| langlaufer | (noun) a cross-country skier | - |
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| laticifer | (noun) a plant duct containing latex | - |
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| lifer | (noun) a prisoner serving a term of life imprisonment | - |
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| lipfern | (noun) any of various terrestrial ferns of the genus Cheilanthes; cosmopolitan in arid and semiarid temperate or tropical regions | Synonyms: lip fern |
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| loafer | (noun) person who does no work | Synonyms: bum, do-nothing, idler, layabout |
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| lucifer | (noun) lighter consisting of a thin piece of wood or cardboard tipped with combustible chemical; ignites with friction | Synonyms: friction match, match |
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| luciferin | (noun) pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation | - |
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| midwifery | (noun) assisting women at childbirth | - |
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| (noun) the branch of medicine dealing with childbirth and care of the mother | Synonyms: OB, obstetrics, tocology |
| muciferous | (adjective) containing or secreting mucus | - |
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| nectariferous | (adjective) possessing nectaries | - |
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| noneffervescent | (adjective) not effervescent | - |
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| (adjective) not sparkling | Synonyms: still |
| noninterference | (noun) a foreign policy of staying out of other countries' disputes | Synonyms: nonintervention |
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| nonproliferation | (noun) the prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons) | Synonyms: non-proliferation |
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| nontransferable | (adjective) incapable of being transferred | Synonyms: unassignable, untransferable |
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| odoriferous | (adjective) having a natural fragrance | Synonyms: odorous, perfumed, scented, sweet-scented, sweet-smelling, sweet |
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| (adjective) emitting an odor | Synonyms: odorous |
| offer | (noun) a usually brief attempt | Synonyms: crack, fling, go, pass, whirl |
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| (noun) something offered (as a proposal or bid) | Synonyms: offering |
| (noun) the verbal act of offering | Synonyms: offering |
| (verb) put forward for consideration | - |
| (verb) threaten to do something | - |
| (verb) ask (someone) to marry you | Synonyms: declare oneself, pop the question, propose |
| (verb) produce or introduce on the stage | - |
| (verb) present for acceptance or rejection | Synonyms: proffer |
| (verb) propose a payment | Synonyms: bid, tender |
| (verb) give something useful or necessary to | Synonyms: furnish, provide, render, supply |
| (verb) make available for sale | - |
| (verb) offer verbally | Synonyms: extend |
| (verb) make available; provide | Synonyms: extend |
| (verb) agree freely | Synonyms: volunteer |
| (verb) mount or put up | Synonyms: provide, put up |
| (verb) present as an act of worship | Synonyms: offer up |
| offerer | (noun) someone who presents something to another for acceptance or rejection | Synonyms: offeror |
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| offering | (noun) the act of contributing to the funds of a church or charity | Synonyms: oblation |
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| (noun) something offered (as a proposal or bid) | Synonyms: offer |
| (noun) the verbal act of offering | Synonyms: offer |
| (noun) money contributed to a religious organization; item or items contributed to a religious organization for religious purposes | - |
| offeror | (noun) someone who presents something to another for acceptance or rejection | Synonyms: offerer |
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| offertory | (noun) the offerings of the congregation at a religious service | - |
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| ossiferous | (adjective) containing bones (especially fossil bones) | - |
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| perfervid | (adjective) characterized by intense emotion | Synonyms: ardent, fervent, fervid, fiery, impassioned, torrid |
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| pestiferous | (adjective) causing irritation or annoyance | Synonyms: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, plaguey, plaguy, teasing, vexatious, vexing |
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| (adjective) likely to spread and cause an epidemic disease | Synonyms: pestilent, pestilential, plaguey |
| (adjective) tending to corrupt or pervert | Synonyms: corruptive, perversive |
| (adjective) contaminated with infecting organisms | Synonyms: dirty |
| pilfer | (verb) make off with belongings of others | Synonyms: abstract, cabbage, filch, hook, lift, nobble, pinch, purloin, snarf, sneak, swipe |
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| pilferage | (noun) the act of stealing small amounts or small articles | - |
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