Affair

Noun

 * 1) That which is done or is to be done; matter; concern; business of any kind, commercial, professional, or public; &mdash; often in the  plural.
 * 2) Any proceeding or action which it is wished to refer to or characterize vaguely.
 * 3)  An action or engagement not of sufficient magnitude to be called a battle.
 * 4) A material object (vaguely designated).
 * 5) An adulterous relationship. (from affaire de cœur.)

Adjectives for Affair
Gargantuan; spiritual; delicate; practical; multifarious; tumultuous; domestic; conventional; financial; droll; disagreeable; pressing; internal; personal; celebrated; complicated; instructive; public; petty; weighty; vast; grave; ecclesiastical; monotonous; corporate;  clandestine; passing; quiet; prim; sublunary; uninteresting;  intimate; detestable;   charitable;   masculine; elaborate; dramatic; vigorous; rustic; unsettled; momentous;  foolish;  flimsy;  insignificant; wearisome; troublous; warlike; multitudinous (plural); provocative; secret; temporal; risky; supernatural; deplorable; fatal; community;  wretched; barbarous; rollicking; primitive; hasty; reputable; gay; charming; harmless; enchanting; colorful; profitable; resplendent; spectacular; pretentious; colossal;  rueful; painful; freakish;  sordid; unsavory; tragic; diabolic; disreputable; absurd; distasteful; scandalous;  iniquitous; sanguinary; ferocious; blundering; dismal; apathetic; frail-looking; terrestial; academic; amorous; intricate; drawn-out; complex; droll;  flippant; bewildering; laborious; different.

Verbs for Affair
absorb in -s; administer -s; be conversant with -; carry on -s; change -s; characterize -; commit - to; con -s; scan -; conclude -; conduct -; connect -; control -; deal with -s; debate -s; detach from -s; dispute -s; embroil with -s; emerge from -; entangle in - s; expatiate - s; extricate from - s; grapple with - s; grasp - s; guarantee -; guide -s; hinder -; indulge in -s; intrude in -s; jumble up -s; manage -s; meddle in -s; muddle -s; operate -s; order -s; parallel -; persevere in -; pertain to -; picture -; place at the head of -s; pry into -s; shirk -s; snow under with -s; supervene in -s; support -; transact -s; travel from one - to another -; undertake -; veil -; weather -; wind up -s; - drags; - intrigues; - prospers; - recurs; - rests; - ripens.

Synonyms for Affair
incident, event, concern, duty, business, occasion, liaison, amour, happening.

Thesaurus
activities; activity; adulterous affair; adultery; affairs; amor; amour; article; artifact; at home; attempt; bag; beeswax; business; care; commerce; commitment; concern; concernment; contract; cuckoldry; cup of tea; deal; dingus; dofunny; dohickey; doing; dojigger; dojiggy; domajig; domajigger; doodad; dowhacky; effort; employ; employment; engagement; entanglement; enterprise; eppes; eternal triangle; etwas; event; fling; flirtation; flumadiddle; forbidden love; function; gadget; gathering; get-together; gigamaree; gimmick; gizmo; hanky-panky; happening; hickey; hootenanny; hootmalalie; illicit love; incident; infidelity; interest; intrigue; issue; jigger; job; labor; levee; liaison; lookout; love; love affair; material thing; matinee; matter; object; obligation; occasions; occupation; occurrence; operation; palaver; pie; plan; proceeding; program; project; proposition; quelque chose; reception; relationship; responsibility; reunion; romance; romantic tie; salon; service; sociable; social; social affair; social gathering; soiree; something; task; thing; thingum; thingumabob; thingumadad; thingumadoodle; thingumajig; thingumajigger; thingumaree; thingummy; topic; transaction; triangle; undertaking; unfaithfulness; venture; wake; whatchy; widget; work

Etymology
afere, affere, afaire,  affaire, from a faire to do; Latin ad- + facere to do. See fact, and confer ado.