advance, v. progress, increase; promote, elevate; enhance, augment.  Antonyms:  retreat, retrograde, decline, deteriorate.

advance guard. vanguard, van.

advancement, n. progress, progression; promotion, preferment, exaltation, aggrandizement, furtherance.

advantage, n. vantage-ground; superiority, mastery, ascendency; benefit, avail, profit.  Antonym:  disadvantage.

adventurous, a. adventuresome, temerarious, venturous.

adversary, n. enemy, foe, antagonist, opponent.

adversity, n. misfortune, buffeting, disaster, affliction, reverses, trouble.

advertise, v. announce, publish, proclaim, trumpet.

advertisement, n. announcement.

advice, n. counsel, admonition, monition, recommendation; information, tidings, report.  Associated Words:  admonitory, mentorial, monitorial.

advisable, a. expedient, desirable, befitting.  Antonym:  inadvisable.

advise, v. counsel, admonish, warn; apprise, inform, notify, acquaint, tell; advise with, consult, confer.

advisedly, adv. purposely, intentionally, designedly, deliberately, knowingly.

advisement, n. consideration, deliberation, consultation.

adviser, n. counselor, mentor, monitor, admonitor.

advocate, n. defender, apologist, vindicator, propagandist, upholder, promoter.

aerial, a. atmospheric; aeriform, vaporous, ethereal, empyreal, empyrean.

affability, n. courteousness, civility, complaisance, sociability, graciousness.

affable, a. courteous, sociable, gracious, cordial, benign, complaisant, accessible.  Antonyms:  inaffable, discourteous.

affect, v. act upon, move, touch, influence, melt; concern, bear upon, interest; dispose, turn, incline.

affectation, n. mannerism, pretension, puppetry, simulation.

affected, a. assumed, feigned, simulated, unnatural.  Antonyms:  unaffected, sincere, natural, unfeigned.

affecting, a. touching, moving, pathetic, piteous.

affectionate, a. devoted, fond, loving, ardent.

affidavit, n. deposition.  Associated Words:  affiant, deponent, jurant, depose.

affiliation, n. adoption, connection, association.

affirm, v. assert (positively), aver, asseverate, state.

affirmation, n. assertion, averment, asseveration.

affirmative, a. confirmative, ratifying, approving.

affix, v. subjoin, annex, append.

afflict, v. persecute, distress, scourge, trouble, harass.

affliction, n. tribulation, adversity, trouble, buffeting, bereavement, hardship, visitation, scourge, distress, misfortune.

affront, n. indignity, insult, outrage, contumely, offense.

aflutter, a. agitated, perturbed, discomposed, excited.  Antonyms:  calm, composed.

aforethought, a. designed, prepense, premeditated, deliberate, intentional.