| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| circumnavigate | (verb) travel around, either by plane or ship | Synonyms: compass |
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| circumnavigation | (noun) traveling around something (by ship or plane) | - |
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| invigilate | (verb) watch over (students taking an exam, to prevent cheating) | Synonyms: proctor |
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| invigilation | (noun) keeping watch over examination candidates to prevent cheating | - |
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| invigilator | (noun) someone who watches examination candidates to prevent cheating | - |
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| invigorate | (verb) impart vigor, strength, or vitality to | Synonyms: reinvigorate |
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| (verb) make lively | Synonyms: animate, enliven, liven, liven up |
| (verb) give life or energy to | Synonyms: quicken |
| (verb) heighten or intensify | Synonyms: animate, enliven, exalt, inspire |
| invigorated | (adjective) with restored energy | Synonyms: fresh, refreshed, reinvigorated |
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| invigorating | (adjective) imparting strength and vitality | - |
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| invigoration | (noun) the activity of giving vitality and vigour to something | Synonyms: animation, vivification |
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| (noun) quality of being active or spirited or alive and vigorous | Synonyms: animation, brio, spiritedness, vivification |
| invigorator | (noun) an agent that gives or restores life or vigor | Synonyms: enlivener, quickener |
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| navigability | (noun) the quality of being suitable for the passage of a ship or aircraft | - |
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| navigable | (adjective) able to be sailed on or through safely | - |
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| navigate | (verb) act as the navigator in a car, plane, or vessel and plan, direct, plot the path and position of the conveyance | Synonyms: pilot |
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| (verb) travel on water propelled by wind or by other means | Synonyms: sail, voyage |
| (verb) direct carefully and safely | - |
| navigation | (noun) the guidance of ships or airplanes from place to place | Synonyms: pilotage, piloting |
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| (noun) the work of a sailor | Synonyms: sailing, seafaring |
| (noun) ship traffic | - |
| navigational | (adjective) of or relating to navigation | - |
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| navigator | (noun) in earlier times, a person who explored by ship | - |
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| (noun) the member of an aircrew who is responsible for the aircraft's course | - |
| (noun) the ship's officer in charge of navigation | Synonyms: sailing master |
| ravigote | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigotte |
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| ravigotte | (noun) veloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capers | Synonyms: ravigote |
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| reinvigorate | (verb) impart vigor, strength, or vitality to | Synonyms: invigorate |
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| reinvigorated | (adjective) with restored energy | Synonyms: fresh, invigorated, refreshed |
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| unnavigable | (adjective) incapable of being navigated | - |
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| unvigilant | (adjective) not alert to what is potentially dangerous | Synonyms: unalert, unwatchful |
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| vigesimal | (adjective) relating to or based on the number twenty | - |
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| vigil | (noun) a purposeful surveillance to guard or observe | Synonyms: watch |
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| (noun) the rite of staying awake for devotional purposes (especially on the eve of a religious festival) | Synonyms: watch |
| (noun) a period of sleeplessness | - |
| vigilance | (noun) vigilant attentiveness | Synonyms: watchfulness, weather eye |
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| (noun) the process of paying close and continuous attention | Synonyms: alertness, wakefulness, watchfulness |
| vigilant | (adjective) carefully observant or attentive; on the lookout for possible danger | Synonyms: argus-eyed, open-eyed, wakeful, watchful |
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| vigilante | (noun) member of a vigilance committee | Synonyms: vigilance man |
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| vigilantism | (noun) the actions of a vigilance committee in trying to enforce the laws | - |
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| vigilantly | (adverb) in a watchful manner | Synonyms: watchfully |
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| vignette | (noun) a small illustrative sketch (as sometimes placed at the beginning of chapters in books) | - |
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| (noun) a photograph whose edges shade off gradually | - |
| (noun) a brief literary description | Synonyms: sketch |
| vigor | (noun) active strength of body or mind | Synonyms: dynamism, heartiness, vigour |
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| (noun) an imaginative lively style (especially style of writing) | Synonyms: energy, muscularity, vigour, vim |
| (noun) forceful exertion | Synonyms: energy, vigour, zip |
| vigorish | (noun) an exorbitant or unlawful rate of interest | Synonyms: usury |
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| (noun) a percentage (of winnings or loot or profit) taken by an operator or gangster | Synonyms: rake-off |
| vigorous | (adjective) characterized by forceful and energetic action or activity | - |
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| (adjective) strong and active physically or mentally | - |
| vigorously | (adverb) with vigor; in a vigorous manner | Synonyms: smartly |
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| vigour | (noun) active strength of body or mind | Synonyms: dynamism, heartiness, vigor |
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| (noun) an imaginative lively style (especially style of writing) | Synonyms: energy, muscularity, vigor, vim |
| (noun) forceful exertion | Synonyms: energy, vigor, zip |