| nictitation | (noun) a reflex that closes and opens the eyes rapidly | Synonyms: blink, blinking, eye blink, nictation, wink, winking |
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| nucleonics | (noun) the branch of physics that studies the internal structure of atomic nuclei | Synonyms: atomic physics, nuclear physics |
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| nudnick | (noun) (Yiddish) someone who is a boring pest | Synonyms: nudnik |
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| organic | (noun) a fertilizer that is derived from animal or vegetable matter | Synonyms: organic fertiliser, organic fertilizer |
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| organicism | (noun) theory that the total organization of an organism rather than the functioning of individual organs is the determinant of life processes | - |
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| panic | (noun) an overwhelming feeling of fear and anxiety | Synonyms: affright, terror |
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| (noun) sudden mass fear and anxiety over anticipated events | Synonyms: scare |
| panicle | (noun) compound raceme or branched cluster of flowers | - |
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| pantechnicon | (noun) a large moving van (especially one used for moving furniture) | - |
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| penicillamine | (noun) a drug (trade name Cuprimine) used to treat heavy metal poisoning and Wilson's disease and severe arthritis | Synonyms: Cuprimine |
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| penicillin | (noun) any of various antibiotics obtained from Penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases | - |
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| penicillinase | (noun) enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic | Synonyms: beta-lactamase |
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| perniciousness | (noun) grave harmfulness or deadliness | Synonyms: toxicity |
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| philharmonic | (noun) a large orchestra; can perform symphonies | Synonyms: symphony, symphony orchestra |
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| phoenicophorium | (noun) latanier palm | Synonyms: genus Phoenicophorium |
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| phonics | (noun) teaching reading by training beginners to associate letters with their sound values | - |
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| photomechanics | (noun) the technique of using photomechanical methods to make photographs into plates for printing | - |
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| (noun) the process whereby printing surfaces (plates or cylinders) are produced by photographic methods | Synonyms: photoplate making |
| picknicker | (noun) a person who is picnicking | Synonyms: picnicker |
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| picnic | (noun) any undertaking that is easy to do | Synonyms: breeze, child's play, cinch, duck soup, piece of cake, pushover, snap, walkover |
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| (noun) any informal meal eaten outside or on an excursion | - |
| (noun) a day devoted to an outdoor social gathering | Synonyms: field day, outing |
| picnicker | (noun) a person who is picnicking | Synonyms: picknicker |
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| polytechnic | (noun) a technical school offering instruction in many industrial arts and applied sciences | Synonyms: engineering school, polytechnic institute |
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| pumpernickel | (noun) bread made of coarse rye flour | Synonyms: black bread |
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| pyrotechnic | (noun) (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc. | Synonyms: firework |
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| pyrotechnics | (noun) the craft of making fireworks | Synonyms: pyrotechny |
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| (noun) (music) brilliance of display (as in the performance of music) | - |
| radiocommunication | (noun) medium for communication | Synonyms: radio, wireless |
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| sanicle | (noun) a plant of the genus Sanicula having palmately compound leaves and unisexual flowers in panicled umbels followed by bristly fruit; reputed to have healing powers | Synonyms: snakeroot |
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| schizophrenic | (noun) someone who is afflicted with schizophrenia | - |
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| snick | (noun) a small cut | Synonyms: nick, notch |
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| (noun) a glancing contact with the ball off the edge of the cricket bat | - |
| snicker | (noun) a disrespectful laugh | Synonyms: snigger, snort |
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| snickersnee | (noun) fighting with knives | Synonyms: cut-and-thrust, knife fight |
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| subtonic | (noun) (music) the seventh note of the diatonic scale | Synonyms: leading tone |
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| supertonic | (noun) (music) the second note of a diatonic scale | - |
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| synchronicity | (noun) the relation that exists when things occur at the same time | Synonyms: synchroneity, synchronisation, synchronism, synchronization, synchronizing, synchrony |
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| technical | (noun) (basketball) a foul that can be assessed on a player or a coach or a team for unsportsmanlike conduct; does not usually involve physical contact during play | Synonyms: technical foul |
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| (noun) a pickup truck with a gun mounted on it | - |
| technicality | (noun) a specific detail in a set of rules or terms belonging to a particular field | - |
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| (noun) the state of being technical as in the use of technical terms or methods | - |
| technician | (noun) someone whose occupation involves training in a specific technical process | - |
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| (noun) someone known for high skill in some intellectual or artistic technique | - |
| technicolor | (noun) a trademarked method of making color motion pictures | - |
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| tectonics | (noun) the branch of geology studying the folding and faulting of the earth's crust | Synonyms: plate tectonic theory, plate tectonics |
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| (noun) the science of architecture | Synonyms: architectonics |
| telecommunication | (noun) (often plural) the branch of electrical engineering concerned with the technology of electronic communication at a distance | - |
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| (noun) (often plural) systems used in transmitting messages over a distance electronically | Synonyms: telecom |
| thermionics | (noun) the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes) | - |
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| tonic | (noun) a medicine that strengthens and invigorates | Synonyms: restorative |
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| (noun) (music) the first note of a diatonic scale | Synonyms: keynote |
| (noun) a sweet drink containing carbonated water and flavoring | Synonyms: pop, soda, soda pop, soda water |
| (noun) lime- or lemon-flavored carbonated water containing quinine | Synonyms: quinine water, tonic water |
| tonicity | (noun) the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli | Synonyms: tone, tonus |
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| tunic | (noun) any of a variety of loose fitting cloaks extending to the hips or knees | - |
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| (noun) an enveloping or covering membrane or layer of body tissue | Synonyms: adventitia, tunica |
| tunica | (noun) an enveloping or covering membrane or layer of body tissue | Synonyms: adventitia, tunic |
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| tunicate | (noun) primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva | Synonyms: urochord, urochordate |
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| tyrannicide | (noun) killing a tyrant | - |
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| uncommunicativeness | (noun) the trait of being uncommunicative | - |
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| unicorn | (noun) an imaginary creature represented as a white horse with a long horn growing from its forehead | - |
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| unicycle | (noun) a vehicle with a single wheel that is driven by pedals | Synonyms: monocycle |
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| unicyclist | (noun) a person who rides a unicycle | - |
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| veronica | (noun) any plant of the genus Veronica | Synonyms: speedwell |
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| viniculture | (noun) the cultivation of grapes and grape vines; grape growing | Synonyms: viticulture |
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