17-letter words containing n, a, f, i
- professional army — an army of trained soldiers
- professional foul — In football, if a player commits a professional foul, they deliberately do something which is against the rules in order to prevent another player from scoring a goal.
- proficiency badge — an insignia or device granted by the Girl Scouts and worn especially on a uniform to indicate special achievement.
- programming fluid — (jargon) (Or "wirewater") Coffee, unleaded coffee (decaffeinated), Cola, or any caffeinacious stimulant. Many hackers consider these essential for those all-night hacking runs.
- proportional font — a font type in which the width of letters and symbols varies depending on the letter or symbol
- protection factor — a figure representing the relative degree of protection from the sun's rays afforded by a particular sunscreen
- put in a word for — to make favourable mention of (someone); recommend
- rational function — a function that can be written as the quotient of two polynomials with integral coefficients.
- receding forehead — a forehead which slopes backwards
- recursion formula — a formula for determining the next term of a sequence from one or more of the preceding terms.
- reduction formula — a formula, such as sin (90° ± A) = cos A, expressing the values of a trigonometric function of any angle greater than 90° in terms of a function of an acute angle
- reference library — A reference library is a library that contains books which you can look at in the library itself but which you cannot borrow.
- reflection nebula — a cloud of interstellar gas and dust that reflects the light of neighboring stars.
- repeating firearm — a firearm capable of discharging a number of shots without reloading.
- republic of china — People's Republic of, a country in E Asia. 3,691,502 sq. mi. (9,560,990 sq. km). Capital: Beijing.
- republic-of-china — People's Republic of, a country in E Asia. 3,691,502 sq. mi. (9,560,990 sq. km). Capital: Beijing.
- return of capital — A return of capital is a situation in which you receive back money that was previously invested.
- road-fund licence — a licence showing that the tax payable in respect of a motor vehicle has been paid
- rotation of crops — a system of rotating in a fixed order the kinds of crops, as grain or grass, grown in the same field, to maintain soil fertility
- russian wolfhound — borzoi.
- sacrificial anode — Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.
- safety in numbers — If you say that there is safety in numbers, you mean that you are safer doing something if there are a lot of people doing it rather than doing it alone.
- safety inspection — an inspection of a place carried out to ensure that it is safe and not dangerous
- safety precaution — a precaution that is taken in order to ensure that something is safe and not dangerous
- saint elmo's fire — corona discharge.
- san francisco bay — a bay in W California: the harbor of San Francisco; connected with the Pacific by the Golden Gate strait. 50 miles (80 km) long; 3–12 miles (5–19 km) wide.
- sanitary landfill — landfill.
- scarlet firethorn — a Eurasian evergreen, thorny shrub, Pyracantha coccinea, of the rose family, having white, hairy flower clusters and bright red berries.
- schiff-s--reagent — a solution of rosaniline and sulfurous acid in water, used to test for the presence of aldehydes.
- scratch 'n' sniff — denoting a product that releases a smell when scratched
- self-administered — to manage (affairs, a government, etc.); have executive charge of: to administer the law.
- self-aggrandizing — increase of one's own power, wealth, etc., usually aggressively.
- self-annihilation — self-destruction; suicide.
- self-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
- self-commendation — the act of commending; recommendation; praise: commendation for a job well done.
- self-condemnation — the act of condemning.
- self-confirmation — the act of confirming.
- self-consecration — the act of setting oneself to a task or vocation without ordination by others or by a religious body.
- self-conservation — the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights.
- self-depreciating — self-deprecating.
- self-dissociation — an act or instance of dissociating.
- self-emancipation — the act of emancipating.
- self-entertaining — affording entertainment; amusing; diverting: We spent an entertaining evening at the theater.
- self-flagellation — the act or process of flagellating.
- self-impregnating — to make pregnant; get with child or young.
- self-incompatible — not capable of self-pollination.
- self-perpetuating — continuing oneself in office, rank, etc., beyond the normal limit.
- self-presentation — an act of presenting.
- self-preservation — preservation of oneself from harm or destruction.
- self-purification — a natural process of purifying, as the ability of a body of water to rid itself of pollutants.