is a specific kind of: unit, whole.

is a broader term that covers: article | facility | Americana | anachronism | antiquity | block | button | commodity, good, trade good | cone | covering | creation | decker | decoration, ornament, ornamentation | electroplate | excavation | duplicate, extra | cloth, fabric, material, textile | facility, installation | fixture | float | insert, inset | instrumentality, instrumentation | bed, layer | lemon, stinker | line | marker | mystification | opening | cushioning, padding | plaything, toy | ready-made | restoration | flat solid, sheet | sphere | square | squeaker | slip, strip | construction, structure | surface | thing | track | way | weight | building material | pavement, paving, paving material ... show more.

is the opposite of: natural object.

derivation: artefactual, artifactual.