| introvertish | (adjective) somewhat introverted | Synonyms: shut-in |
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| introvertive | (adjective) directed inward; marked by interest in yourself or concerned with inner feelings | Synonyms: introversive |
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| invert | (verb) turn inside out or upside down | Synonyms: reverse, turn back |
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| (verb) make an inversion (in a musical composition) | - |
| (verb) reverse the position, order, relation, or condition of | Synonyms: reverse |
| invertase | (noun) an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose | Synonyms: saccharase, sucrase |
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| invertebrate | (adjective) lacking a backbone or spinal column | Synonyms: spineless |
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| (noun) any animal lacking a backbone or notochord; the term is not used as a scientific classification | - |
| inverted | (adjective) (of a plant ovule) completely inverted; turned back 180 degrees on its stalk | Synonyms: anatropous |
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| (adjective) being in such a position that top and bottom are reversed | Synonyms: upside-down |
| inverter | (noun) an electrical converter that converts direct current into alternating current | - |
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| invertible | (adjective) having an additive or multiplicative inverse | - |
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| kilohertz | (noun) one thousand periods per second | Synonyms: kc, kHz, kilocycle, kilocycle per second |
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| lacertid | (noun) Old World terrestrial lizard | Synonyms: lacertid lizard |
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| lacertilian | (adjective) of or relating to lizards | Synonyms: saurian |
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| lambert | (noun) a cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter | Synonyms: L |
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| libertarian | (noun) someone who believes the doctrine of free will | - |
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| (noun) an advocate of libertarianism | - |
| libertarianism | (noun) an ideological belief in freedom of thought, speech and action | - |
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| libertine | (adjective) unrestrained by convention or morality | Synonyms: debauched, degenerate, degraded, dissipated, dissolute, fast, profligate, riotous |
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| (noun) a dissolute person; usually a man who is morally unrestrained | Synonyms: debauchee, rounder |
| libertinism | (noun) A lifestyle or pattern of behavior characterized by self-indulgence and lack of restraint, especially one involving sexual promiscuity and rejection of religious or other moral authority. | - |
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| liberty | (noun) an act of undue intimacy | Synonyms: familiarity, impropriety, indecorum |
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| (noun) immunity from arbitrary exercise of authority: political independence | Synonyms: autonomy |
| (noun) freedom of choice | - |
| (noun) personal freedom from servitude or confinement or oppression | - |
| (noun) leave granted to a sailor or naval officer | Synonyms: shore leave |
| megahertz | (noun) one million periods per second | Synonyms: Mc, megacycle, megacycle per second, MHz |
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| neandertal | (adjective) ill-mannered and coarse and contemptible in behavior or appearance | Synonyms: boorish, loutish, neanderthal, oafish, swinish |
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| neanderthal | (adjective) ill-mannered and coarse and contemptible in behavior or appearance | Synonyms: boorish, loutish, neandertal, oafish, swinish |
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| nemertean | (noun) soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract | Synonyms: nemertine, proboscis worm, ribbon worm |
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| nemertine | (noun) soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract | Synonyms: nemertean, proboscis worm, ribbon worm |
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| nevertheless | (adverb) despite anything to the contrary (usually preceding a concession) | Synonyms: all the same, at the same time, even so, however, nonetheless, notwithstanding, still, withal, yet |
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| nonassertive | (adjective) not aggressively self-assured, though not necessarily lacking in confidence | - |
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| offertory | (noun) the offerings of the congregation at a religious service | - |
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| omerta | (noun) a code of silence practiced by the Mafia; a refusal to give evidence to the police about criminal activities | - |
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| overexert | (verb) exert (oneself) excessively and go beyond one's strength | - |
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| overexertion | (noun) excessive exertion; so much exertion that discomfort or injury results | - |
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| overt | (adjective) open and observable; not secret or hidden | Synonyms: open |
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| overtake | (verb) catch up with and possibly overtake | Synonyms: catch, catch up with |
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| (verb) overcome, as with emotions or perceptual stimuli | Synonyms: overcome, overpower, overwhelm, sweep over, whelm |
| (verb) travel past | Synonyms: overhaul, pass |
| overtaking | (noun) going by something that is moving in order to get in front of it | Synonyms: passing |
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| overtax | (verb) tax excessively | - |
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| overthink | (verb) to spend to much time considering something and thus reach the wrong conclusion | - |
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| overthrow | (noun) the termination of a ruler or institution (especially by force) | - |
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| (noun) the act of disturbing the mind or body | Synonyms: derangement, upset |
| (verb) rule against | Synonyms: override, overrule, overturn, reverse |
| (verb) cause the downfall of; of rulers | Synonyms: bring down, overturn, subvert |
| overtime | (noun) playing time beyond regulation, to break a tie | Synonyms: extra time |
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| (noun) work done in addition to regular working hours | - |
| (adverb) beyond the regular time | - |
| overtire | (verb) tire excessively | Synonyms: overfatigue, overweary |
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| overtly | (adverb) in an overt manner | - |
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| overtolerance | (noun) too much permissiveness | - |
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| overtone | (noun) a harmonic with a frequency that is a multiple of the fundamental frequency | Synonyms: partial, partial tone |
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| (noun) (usually plural) an ulterior implicit meaning or quality | - |
| overtop | (verb) look down on | Synonyms: command, dominate, overlook |
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| overtrump | (verb) play a trump higher than (one previously played) to the trick | - |
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| overture | (noun) a tentative suggestion designed to elicit the reactions of others | Synonyms: advance, approach, feeler |
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| (noun) orchestral music played at the beginning of an opera or oratorio | - |
| (noun) something that serves as a preceding event or introduces what follows | Synonyms: preliminary, prelude |
| overturn | (noun) the act of upsetting something | Synonyms: turnover, upset |
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| (noun) an improbable and unexpected victory | Synonyms: upset |
| (verb) change radically | Synonyms: revolutionise, revolutionize |
| (verb) rule against | Synonyms: override, overrule, overthrow, reverse |
| (verb) cancel officially | Synonyms: annul, countermand, lift, repeal, rescind, reverse, revoke, vacate |
| (verb) turn from an upright or normal position | Synonyms: tip over, tump over, turn over |
| (verb) cause to overturn from an upright or normal position | Synonyms: bowl over, knock over, tip over, tump over, turn over, upset |
| (verb) cause the downfall of; of rulers | Synonyms: bring down, overthrow, subvert |
| overturned | (adjective) having been turned so that the bottom is no longer the bottom | Synonyms: upset, upturned |
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| pert | (adjective) characterized by a lightly pert and exuberant quality | Synonyms: impertinent, irreverent, saucy |
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| pertain | (verb) be a part or attribute of | Synonyms: appertain |
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| (verb) be relevant to | Synonyms: bear on, come to, concern, have to do with, refer, relate, touch, touch on |
| pertainym | (noun) meaning relating to or pertaining to | - |
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| pertinacious | (adjective) stubbornly unyielding | Synonyms: dogged, dour, persistent, tenacious, unyielding |
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| pertinaciously | (adverb) in a dogged and pertinacious manner | - |
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| pertinacity | (noun) persistent determination | Synonyms: doggedness, perseverance, persistence, persistency, tenaciousness, tenacity |
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| pertinence | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinency |
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| pertinency | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: applicability, pertinence |
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| pertinent | (adjective) being of striking appropriateness and pertinence | Synonyms: apposite, apt |
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| (adjective) having precise or logical relevance to the matter at hand | Synonyms: to the point |
| pertinently | (adverb) in a pertinent way | - |
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| pertly | (adverb) in an impudent or impertinent manner | Synonyms: freshly, impertinently, impudently, saucily |
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| pertness | (noun) inappropriate playfulness | Synonyms: archness, impertinence, perkiness, sauciness |
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| (noun) quality of being lively and confident | - |
| perturb | (verb) throw into great confusion or disorder | Synonyms: derange, throw out of kilter |
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| (verb) disturb in mind or make uneasy or cause to be worried or alarmed | Synonyms: cark, disorder, disquiet, distract, trouble, unhinge |
| (verb) cause a celestial body to deviate from a theoretically regular orbital motion, especially as a result of interposed or extraordinary gravitational pull | - |
| (verb) disturb or interfere with the usual path of an electron or atom | - |
| perturbation | (noun) the act of causing disorder | Synonyms: disruption |
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| (noun) a disposition that is confused or nervous and upset | Synonyms: fluster |
| (noun) activity that is a malfunction, intrusion, or interruption | Synonyms: disturbance |
| (noun) (physics) a secondary influence on a system that causes it to deviate slightly | - |
| (noun) an unhappy and worried mental state | Synonyms: disturbance, upset |
| perturbed | (adjective) thrown into a state of agitated confusion; (`rattled' is an informal term) | Synonyms: flustered, hot and bothered, rattled |
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| perturbing | (adjective) causing distress or worry or anxiety | Synonyms: distressful, distressing, disturbing, troubling, worrisome, worrying |
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| pertussis | (noun) a disease of the respiratory mucous membrane | Synonyms: whooping cough |
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| pervert | (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: degenerate, deviant, deviate, perv, perve |
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| (verb) change the inherent purpose or function of something | Synonyms: abuse, misuse |
| (verb) practice sophistry; change the meaning of or be vague about in order to mislead or deceive | Synonyms: convolute, sophisticate, twist, twist around |
| (verb) corrupt morally or by intemperance or sensuality | Synonyms: corrupt, debase, debauch, demoralise, demoralize, deprave, misdirect, profane, subvert, vitiate |
| perverted | (adjective) (used of sexual behavior) showing or appealing to bizarre or deviant tastes | Synonyms: kinky |
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| (adjective) deviating from what is considered moral or right or proper or good | Synonyms: depraved, perverse, reprobate |
| (adjective) having an intended meaning altered or misrepresented | Synonyms: distorted, misrepresented, twisted |
| poverty | (noun) the state of having little or no money and few or no material possessions | Synonyms: impoverishment, poorness |
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| preconcerted | (adjective) previously arranged or agreed on | - |
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| prepubertal | (adjective) (especially of human beings) at the age immediately before puberty; often marked by accelerated growth | Synonyms: prepubescent |
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| prepuberty | (noun) a period of two years immediately prior to the onset of puberty when growth and changes leading to sexual maturity occur | - |
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| proconvertin | (noun) a coagulation factor formed in the kidney under the influence of vitamin K | Synonyms: cothromboplastin, factor VII, stable factor |
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| propertied | (adjective) owning land or securities as a principal source of revenue | Synonyms: property-owning |
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| property | (noun) any movable articles or objects used on the set of a play or movie | Synonyms: prop |
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| (noun) a basic or essential property shared by all members of a class | - |
| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: attribute, dimension |
| (noun) any area set aside for a particular purpose | Synonyms: place |
| (noun) something owned; any tangible or intangible possession that is owned by someone | Synonyms: belongings, holding |
| propertyless | (adjective) of those who work for wages especially manual or industrial laborers | Synonyms: blue-collar, wage-earning, working-class |
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| pubertal | (adjective) of or related to puberty | - |
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| puberty | (noun) the time of life when sex glands become functional | Synonyms: pubescence |
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| reassert | (verb) strengthen or make more firm | Synonyms: confirm |
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| reassertion | (noun) renewed affirmation | Synonyms: reaffirmation |
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| reconvert | (verb) convert back | - |
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| repertoire | (noun) a collection of works (plays, songs, operas, ballets) that an artist or company can perform and do perform for short intervals on a regular schedule | Synonyms: repertory |
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| (noun) the entire range of skills or aptitudes or devices used in a particular field or occupation | Synonyms: repertory |
| repertory | (noun) a storehouse where a stock of things is kept | - |
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| (noun) the entire range of skills or aptitudes or devices used in a particular field or occupation | Synonyms: repertoire |
| (noun) a collection of works (plays, songs, operas, ballets) that an artist or company can perform and do perform for short intervals on a regular schedule | Synonyms: repertoire |
| (noun) a theatrical company that performs plays from a repertoire | Synonyms: repertory company, stock company |
| retrovert | (verb) go back to a previous state | Synonyms: regress, return, revert, turn back |
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| revert | (verb) go back to a previous state | Synonyms: regress, retrovert, return, turn back |
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| (verb) undergo reversion, as in a mutation | - |
| revertible | (adjective) to be returned to the former owner or that owner's heirs | - |
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| reverting | (adjective) tending to return to an earlier state | Synonyms: returning |
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| (noun) a failure to maintain a higher state | Synonyms: backsliding, lapse, lapsing, relapse, relapsing, reversion |
| sabertooth | (noun) any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene | Synonyms: saber-toothed tiger |
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| sabertoothed | (adjective) having teeth that resemble sabers | Synonyms: saber-toothed, sabre-toothed |
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| semidesert | (noun) a region much like a desert but usually located between a desert and the surrounding regions | - |
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| sertindole | (noun) an antipsychotic medication used in the treatment of schizophrenia. | - |
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| sertraline | (noun) a selective-serotonin reuptake inhibitor commonly prescribed as an antidepressant (trade name Zoloft) | Synonyms: Zoloft |
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| sertularian | (noun) feathery colony of long-branched stems bearing stalkless paired polyps | - |
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| sherbert | (noun) a frozen dessert made primarily of fruit juice and sugar, but also containing milk or egg-white or gelatin | Synonyms: sherbet |
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| silvertip | (noun) powerful brownish-yellow bear of the uplands of western North America | Synonyms: grizzly, grizzly bear, silver-tip, Ursus arctos horribilis, Ursus horribilis |
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| stertor | (noun) the act of snoring or producing a snoring sound | Synonyms: snore, snoring |
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| stertorous | (adjective) of breathing having a heavy snoring sound | - |
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| stertorously | (adverb) in a noisy and stertorous manner | - |
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| subvert | (verb) to raze to the ground, also figuratively | - |
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| (verb) cause the downfall of; of rulers | Synonyms: bring down, overthrow, overturn |
| (verb) destroy property or hinder normal operations | Synonyms: counteract, countermine, sabotage, undermine, weaken |
| (verb) corrupt morally or by intemperance or sensuality | Synonyms: corrupt, debase, debauch, demoralise, demoralize, deprave, misdirect, pervert, profane, vitiate |
| subverter | (noun) a radical supporter of political or social revolution | Synonyms: revolutionary, revolutionist, subversive |
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| summertime | (noun) the warmest season of the year; in the Northern Hemisphere it extends from the summer solstice to the autumnal equinox | Synonyms: summer |
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| supertanker | (noun) the largest class of oil tankers | - |
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| supertax | (noun) an additional tax on certain kinds of income that has already been taxed | Synonyms: surtax |
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| supertitle | (noun) translation of the words of a foreign opera (or choral work) projected on a screen above the stage | Synonyms: surtitle |
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| supertonic | (noun) (music) the second note of a diatonic scale | - |
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