Contrivance
Object, item, commodity, gadget, instrument, tool, entity, whatsit, what's-its-name, whatchamacallit, thingy, thingamajig, oojah, doodah, gubbins, doohickey, dingus, article, artefact, device, contrivance, utensil, implement, body, what-d'you-call-it, what's-it, thingummy, thingamabob, oojamaflip, gizmo, doobry, doodad, doojigger, and thingo.
Stuff
Belongings, stuff, worldly goods, personal effects, paraphernalia, bits and pieces, luggage, bags, chattels, valuables, garments, gear, togs, traps, trek, possessions, property, goods, effects, impedimenta, bits and bobs, baggage, bags and baggage, movables, clothes, goods and chattels, junk, garms, clobber, and dunnage.
Equipment
Equipment, gear, tackle, implements, utensils, apparatus, kit, stuff, tools, and accoutrements.
Undertaking
Activity, action, undertaking, feat, job, piece of business, notion, concept, concern, worry, remark, comment, observation, pronouncement, episode, happening, eventuality, act, deed, exploit, task, chore, thought, idea, conception, matter, preoccupation, statement, utterance, declaration, incident, event, occurrence, and phenomenon.
Affairs
Attribute
Characteristic, attribute, trait, point, facet, fact, detail, factor, quality, property, feature, aspect, element, piece of information, and particular.
One's bag
What one likes, one's cup of tea, what turns one on, what interests one, one's bag, and what floats one's boat.