61.ACROPHOBIA[ak-ruh foh-bee-uh]
Synonyms:
altophobia, batophobia, hypsiphobia.
Antonyms:
bathophobia.
Usage: This adventure is a bit of a challenge for those having acrophobia.
62. ACTUARY [ak-choo-er-ee]
(n) 1. A statistician who computes insurance risks and premiums. 2. (formerly) a registrar or clerk.
Synonyms:
reckoner, auditor, analyst, comptroller. bookkeeper.
Usage:
As a renowned actuary Mr. Jack is flooded with many offers from MNCs.
63. ACTUATE [ak-choo-eyt](v) to motivate or incite into action
Synonyms:
Activate, inspire, spark, trigger, arouse, energize, spur, stimulate, incite, instigate. Antonyms:
impede, stop, thwart, baffle, foil, frustrate.
Usage:
The cheerleader actuated the football player to win the game.
64. ACUITY [uh-kyoo-i-tee]
(n)
Synonyms:
keenness, acuteness, sharpness, perception, sensitivity, judgment.
Antonyms:
inability, ineptness, obtusenee, ignorance, indiscretion.
Usage:
In time his youthful acuity of vision failed him, and he needed glasses.
(n) the ability to judge well; keen discernment;
Synonyms:
astuteness, ingenuity, perspicuity, shrewdness, wit, guile, brilliance, sagacity.cannyAntonyms:
obtuseness, stupidity, ignorance, bluntness, ineptness.
Usage:
In his childhood Einstein enthralled all the teachers With his acumen.
66. ADAGE [ad-ij](n) a traditional saying expressing a common experience or observation.
Synonyms:
proverb, axiom, apothegm, saying, saw, aphorism, precept. Antonyms:
paradox, absurdity, nonsense.
The old adage 'Every baby brings its own love' usually turns out true.
(n) 1. utterly unyielding in attitude or opinion in spite of all appeals, urgings, etc. 2. too hard to cut, break, or pierce.
Synonyms:
stubborn, unyielding, determined, unrelenting, stiff, obdurate, inexorable, obstinate. Antonyms:
plaint, complaint, submissive, yielding, easy-going.
Usage:
The adamant donkey troubled his owner. 
68. ADAPT [uh-dapt](v) to make suitable to or fit for a specific use or situation; to adjust oneself to different conditions, environment, etc.
Synonyms:
acclimate, accommodate, accustom, suite, comply.
Antonyms:unsuite, disorder, misfit, disagree.
Usage:
Only human can adapt easily to all circumstances.
(n) an appendix to a book;
Synonyms:
appendix, appendage, addition, attachment, supplement, extra.
Antonyms:body, trunk, subtraction, detriment,
Usage:
an addendum forms a separate distinguishable portion of the whole and it first meant 'a thing to be added'.
n](n) the condition of being abnormally dependent on some habit, esp compulsive dependency on narcotic drugs.
Synonyms:
obsession, carving, weakness, enslavement, overreliance.
Antonyms:
moderation, self-control, constraint.
Usage:
Woman in the picture is an example for a person with multiple addictions.
