vain, vainer, vainest.adjectives
lacking value or substance; not yielding the desired outcome; fruitless (a vain attempt); lacking substance or worth (vain talk; things of vanity that ultimately come to nothing - the physical material life); excessively proud of one's appearance or accomplishments; conceited
in vain.idiom
to no avail; without success (our labor was in vain); to no end; to no good purpose; without merit, success or result; worthless, idle; a waste of time; marked by futility or ineffectualness, useless; also, having or showing undue or excessive pride in one's appearance or achievements, conceited; in an irreverent or disrespectful manner (took the name of the Lord in vain) 
vainness.noun
vainly.adverb
synonym.futile

vanity.noun,.plural.vanities
something that is vain, empty, or valueless; the quality or fact of being vain; inflated pride in oneself, one's appearance and/or in how acquired possessions add to one's opinion of himself; conceit; dressing table

vacillate, vacillated, vacillating.intransitive verbs
to sway through lack of equilibrium; fluctuate; oscillate; to waver in mind, will, or feeling; hesitate in choice of opinions or courses; double minded; cannot make up one's mind as to what to do or which way to follow 
vacillator.noun
vacillatingly.adverb
synonym.hesitate, waver, falter

verbatim.adverb
in the exact words; word for word

violent.adjective
extreme in emotion (angry); intense; marked by extreme force or sudden intense activity; notably furious or vehement; emotionally agitated to the point of loss of self control 
violently.adverb

volition.noun
an act of making a choice or decision; also; a choice or decision made; the power of choosing or determining; will
volitional.adjective

vernacular.adjective
using a language or dialect native to a region or country rather than a literary, cultured, or foreign language 

vice versa.adverb
the order or relation being reversed; conversely

vicious.adjective
having the nature or quality of vice or immorality; depraved; defective; faulty; impure; noxious; dangerously aggressive; savage (a vicious dog); marked by violence or ferocity; fierce (a vicious fight); malicious; spiteful (vicious gossip); worsened by internal causes that reciprocally augment each other (a vicious wage price spiral) 
viciously.adverb
viciousness.noun

synonyms-villainous, iniquitous, nefarious, corrupt, degenerate 
vicious.– may directly oppose virtuous in implying moral depravity, or may connote malignancy, cruelty, or destructive violence (a vicious gangster) 
villainous.– applies to any evil, depraved, or vile conduct or characteristic (a villainous assault) 
iniquitous.– implies absence of all signs of justice or fairness (an iniquitous system of taxation) 
nefarious.– suggests flagrant breaching of time-honored laws and traditions of conduct (the 
nefarious rackets of organized crime) 
corrupt.– stresses a loss of moral integrity or probity (honesty) causing betrayal of principle or sworn obligations (city hall was rife with corrupt politicians) 
degenerate.– means highly reprehensible or offensive in character, nature, or conduct: suggests having sunk to an especially vicious or enervated condition (a degenerate regime propped up by foreign powers) 

vile, viler, vilest.adjectives
morally.despicable or abhorrent.(nothing is so vile as intellectual dishonesty); loathsome; disgusting (vile language; vile acts of deceit to gain selfish advantage over others); repulsive; foul (a vile slum); of little worth or account; common; mean; tending to degrade (vile employments); disgustingly or utterly bad; obnoxious; contemptible (vile weather) (had a vile temper) unpleasant or objectionable (vile weather); offensive; contemptibly low in worth or account; morally depraved; ignoble or wicked (a vile conspiracy)
vilely.adverb
vileness.noun
synonym.base

vicarious.adjective
felt or undergone as if one were taking part in the experience or feelings of another  (read or watched TV about mountain climbing and experienced vicarious thrills; was so involved in the video game he imagined for awhile that he was the person he was playing); endured or done by one person substituting for another (vicarious punishment); acting or serving in place of someone or something else; substituted; committed or entrusted to another, as powers or authority; delegated
vicariously.adverb
vicariousness.noun

vivify, vivified, vivifying, vivifies.transitive verbs
to make more lively, intense, or striking; enliven (a smile may vivify a face; to give or bring life to; animate: vivify a puppet; vivifying the brown grasslands
vivification, vivifier.nouns

vital.adjective
of, relating to, or characteristic of life; living; necessary to the continuation of life; life-sustaining: a vital organ; vital nutrients; full of life; animated; imparting life or animation; invigorating (the sun's vital rays); necessary to continued existence or effectiveness; essential (irrigation is vital to grow crops when the land is dry); concerned with or recording data pertinent to lives (vital records); destructive to life; fatal (a vital injury) 
vitally.adverb
vitalness.noun

vitality.noun,.plural.vitalities
the capacity to live, grow, or develop (plants that lost their vitality when badly pruned); physical or intellectual vigor; energy; the characteristic, principle, or force that distinguishes living things from nonliving things; power to survive (the vitality of an old tradition)

vitalize, vitalized, vitalizing, vitalizes.transitive verbs
to endow with life; animate; to make more lively or vigorous; invigorate
vitalization, vitalizer.nouns

visualize, visualized, visualizing, visualizes.verbs
transitive verbs.to form a mental image of; envisage (tried to visualize the scene as it was described); to make visible
intransitive verbs.to form a mental image
visualization.noun

Veda.noun
any of the oldest Hindu sacred texts, composed in Sanskrit and gathered into four collections

Vedic.adjective
of or relating to the Veda or Vedas, the variety of Sanskrit in which they are written, or the Hindu culture that produced them.
Vedic.noun
the early Sanskrit in which the Vedas are written

vagary.noun,.plural.vagaries
an erratic notion or action; caprice

vigil.noun
a watch kept during normal sleeping hours (it was a long vigil when firemen kept watch on the approaching lava); the act or a period of observing

vertex.noun,.plural.vertexes.or.vertices
the highest point; the apex or summit.(the vertex of a mountain)
Mathematics.-.the point at which the sides of an angle intersect; the point on a triangle or pyramid opposite to and farthest away from its base; a point on a polyhedron common to three or more sides