An object
article, object, item, lifeless object, commodity, device, gadget, material object, conversation piece, being, entity, materiality, corporeality, body, person, something, anything, everything, element, substance, piece, shape, form, figure, configuration, creature, stuff, goods, matter, thingy*, thingamajig*, gizmo*, whatchamacallit*, doohickey*, thingamabob*; see also substance 2.
A circumstance
matter, condition, situation; see circumstance 1.
An act
deed, feat, movement; see action 2.
A characteristic
quality, trait, attribute; see characteristic.
An idea
notion, opinion, impression; see thought 2.
A pitiable person
wretch, poor person, sufferer, urchin; see patient, refugee, tramp 1.
Belongings; usually pl.
possessions, clothes, personals; see property 1.
Something so vague as to be nameless
affair, matter, concern, business, occurrence, anything, everything, something, stuff, point, information, subject, idea, question, indication, intimation, contrivance, word, name, shape, form, entity.
Something to be done
task, obligation, duty; see job 2.