Here’s the organized and neatly sorted version of your vocabulary list:
Definition: Obsolete, out of fashion, no longer usable
Synonyms: Antique, archaic, obsolete, venerable
Antonym: Modern
Sentence: We cannot afford to have antiquated military forces.
Derivatives: Antiquate, antiquating, antiquation, antiquatedness
Definition: Fit for plowing, tillable
Antonym: Untillable
Sentence: If a farmer does not use good conservation measures, the land will not stay arable.
Derivatives: Arability
Definition: Domination; growing power
Antonym: Decline
Sentence: The United States would not patiently submit to the ascendancy of Hitler.
Derivatives: Ascendance, ascend, ascendant, ascension, ascending, ascended
Definition: To waste away, to wither
Antonym: To thrive; to grow
Sentence: His hunger strike caused his body to atrophy.
Derivatives: Atrophied, atrophying, atrophic
Definition: Secret
Synonyms: Covert, furtive, stealthy, surreptitious, underhanded
Antonym: Open; obvious
Sentence: The C.I.A. is involved in clandestine activities.
Derivatives: Clandestinely, clandestineness
Definition: To reconcile, pacify, or renew a friendship
Synonyms: Appease, mollify, placate, propitiate
Antonym: To estrange
Sentence: My husband tried to conciliate me with a gift of roses.
Derivatives: Conciliated, conciliating, conciliator, conciliatoriness, conciliatorily
Definition: Superficial, casual, hastily done
Antonym: Meticulous
Sentence: He gave only cursory consideration to my suggestion.
Derivatives: Cursorily, cursoriness
Definition: Scoffing at, mockery, ridicule
Antonym: Applause
Sentence: The boy received much derision for his plaid gym shorts.
Derivatives: Derisive, derisiveness, derisively, derisory
Definition: Absolute hatred
Synonyms: Animosity, animus, antagonism, antipathy, hostility, rancor
Antonym: Love; admiration
Sentence: I have a lot of enmity for people who provide illegal drugs to children.
Derivatives: Enmities
Definition: To free, to disentangle
Synonyms: Disembarrass, disencumber
Antonym: To snare
Sentence: He could not extricate himself from the trap.
Derivatives: Extrication, extricated, extricable
Definition: Patience, lenience
Antonym: Impatience
Sentence: Because he is so young, we must have forbearance in dealing with him.
Derivatives: Forbear, forbearant, forbearer, forbearing, forbearingly, forbearingness, forbore
Definition: Lacking in seriousness or importance
Antonym: Serious; sober
Sentence: A teacher should limit frivolous behavior in the classroom.
Derivatives: Frivolity, frivolousness, frivolously
Definition: Talkative, rambling
Synonym: Voluble
Antonym: Taciturn
Sentence: He was so garrulous that he repeated everything many times.
Derivatives: Garrulously, garrulousness, garrulity
Definition: Violent, hasty, rash, impulsive
Antonym: Reserved
Sentence: His impetuous behavior caused him to make many mistakes.
Derivatives: Impetuosity, impetuously, impetuousness, impetus
Definition: Skillfully busy or occupied
Synonyms: Assiduous, diligent, sedulous
Antonyms: Slothful, indolent
Sentence: The industrious student will use time wisely.
Derivatives: Industriously, industriousness, industry
Definition: Having a reputation of the worst kind, vicious, notoriously bad
Synonyms: Disreputable, ignominious
Antonym: Illustrious
Sentence: The Japanese attack on Pearl Harbor was an infamous act.
Derivatives: Infamously, infamy, infamies
Definition: Insulting or contemptuous behavior
Synonyms: Arrogance, haughtiness, high-handedness, impertinence
Antonym: Respect
Sentence: His insolence and lack of respect for his mother are shocking.
Derivatives: Insolent, insolently, insolency, insolentness
Definition: Excessive frivolity, flippancy
Antonym: Seriousness
Sentence: It was inappropriate for him to insert some levity into the funeral service.
Derivatives: Levitate, levitation, levitated, levitational, levitative, levitating
Definition: State of being forgotten
Antonym: Remembrance
Sentence: Until the singer's recent hit, his career had fallen into a state of oblivion.
Derivatives: Oblivious, obliviously
Definition: Something that appears false or contradictory but is actually correct
Sentence: It is paradoxical that a man from the South, Lyndon Johnson, led the fight for the passage of a civil rights bill.
Derivatives: Paradoxicality, paradoxicalness, paradoxology, paradoxality
Definition: False testimony under oath
Antonym: Truthful testimony
Sentence: He was charged with perjury for lying to the grand jury.
Derivatives: Perjure, perjured, perjuring, perjurer, perjurious, perjuriously, perjuriousness, perjurous
Definition: Bitter deep-seated ill will, enmity
Synonyms: Animosity, animus, antagonism, antipathy, hostility
Antonym: Affection; kindness
Sentence: I was full of rancor when I learned that the men had killed my parents.
Derivatives: Rancored, rancorous, rancorously
Definition: A self-serving flatterer, a brownnoser
Synonyms: Leech, sponge, toady
Sentence: A wise ruler will not pay attention to the many sycophants who will try to gain his attention.
Derivatives: Sycophancy, sycophantic, sycophantical, sychophantically, sycophantize, sychophantish, sychophantishly
Definition: Changing, fluctuating
Antonym: Static; stable; not easily changed
Sentence: I have vacillating opinions concerning my future career.
Derivatives: Vacillate, vacillatingly, vacillation, vacillatory, vacillator
Definition: Bright, distinct, and clear
Synonym: Graphic
Antonym: Lackluster
Sentence: I have vivid memories of my trip to Europe.
Derivatives: vividly, vividness, vividity, vivific, vivificate, vivification, vivifier, vivify