S: (n) nailhead (something resembling the head of a nail that is used as an ornamental device)
S: (n) necklet (decoration worn about the neck (fur piece or tight necklace) as an ornament)
S: (n) overlay (a layer of decorative material (such as gold leaf or wood veneer) applied over a surface)
S: (n) rosemaling (a Scandinavian style of carved or painted decoration (as on furniture or walls or dinnerware) consisting of floral motifs)
S: (n) set decoration (a decoration used as part of the set of a theatrical or movie production)
S: (n) sgraffito (a ceramic or mural decoration made by scratching off a surface layer to reveal the ground)
S: (n) spiral, volute (ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center)
S: (n) sprig (an ornament that resembles a spray of leaves or flowers)
S: (n) stud, rivet (ornament consisting of a circular rounded protuberance (as on a vault or shield or belt))
S: (n) tail fin, tailfin, fin (one of a pair of decorations projecting above the rear fenders of an automobile)
S: (n) tinsel (a showy decoration that is basically valueless) "all the tinsel of self-promotion"
S: (n) tracery (decoration consisting of an open pattern of interlacing ribs)
S: (n) wind chime, wind bell (a decorative arrangement of pieces of metal or glass or pottery that hang together loosely so the wind can cause them to tinkle)
S: (n) garnish (something (such as parsley) added to a dish for flavor or decoration)