1.  ornamentation(n = noun.state) - the state of being ornamented;
is a kind of state
Derived form verb ornament₂

2.  ornamentation(n = noun.artifact) decoration, ornament - something used to beautify;
is a kind of artefact, artifact
has particulars: adornment, arabesque, architectural ornament, beading, beadwork, bow, brass, centerpiece, centrepiece, christmas tree, cockade, design, figure, pattern, embellishment, finial, floral arrangement, flower arrangement, falderol, folderal, frill, gimcrack, gimcrackery, nonsense, trumpery, gargoyle, garnish, graffiti, graffito, hanging, wall hanging, hood ornament, encrustation, incrustation, inlay, decor, interior decoration, knob, pommel, lunula, molding, moulding, nailhead, necklet, overlay, rosemaling, set decoration, sgraffito, spiral, volute, sprig, rivet, stud, fin, tail fin, tailfin, tinsel, tracery, wind bell, wind chime, garnish

3.  ornamentation(n = noun.act) embellishment - the act of adding extraneous decorations to something;
is a kind of decoration
Derived form verb ornament₁

1.  The act or art of ornamenting, or the state of being ornamented. [1913 Webster]

2.  That which ornaments. C. Kingsley. [1913 Webster]

3.  The ornaments embellishing an object, collectively; as, each room of the palace had a strikingly different ornamentation. [1913 Webster]

N  ornament, floridness c, adj, turgidity, turgescence, altiloquence, declamation, teratology, well-rounded periods, elegance, orotundity, inversion, antithesis, alliteration, paronomasia, figurativeness, flourish, flowers of speech, flowers of rhetoric, frills of style, euphuism, euphemism, big-sounding words, high-sounding words, macrology, sesquipedalia verba, Alexandrine, inflation, pretension, rant, bombast, fustian, prose run mad, fine writing, sesquipedality, Minerva press, phrasemonger, euphuist, euphemist, ornament, beautified, ornate, florid, rich, flowery, euphuistic, euphemistic, sonorous, high-sounding, big-sounding, inflated, swelling, tumid, turgid, turgescent, pedantic, pompous, stilted, orotund, high flown, high flowing, sententious, rhetorical, declamatory, grandiose, grandiloquent, magniloquent, altiloquent, sesquipedal, sesquipedalian, Johnsonian, mouthy, bombastic, fustian, frothy, flashy, flaming, antithetical, alliterative, figurative, artificial, ore rutundo, ornament, ornamentation, ornamental art, ornature, ornateness, adornment, decoration, embellishment, architecture, jewelry, garnish, polish, varnish, French polish, veneer, japanning, lacquer, gilding, plating, ormolu, enamel, cloisonn_e, cosmetics (in general), makeup, eye shadow, rouge, face powder, lipstick, blush, pattern, diaper, powdering, paneling, graining, pargeting, detail, repousse (convexity), texture, richness, tracery, molding, fillet, listel, strapwork, coquillage, flourish, fleur-de-lis, arabesque, fret, anthemion, egg and tongue, egg and dart, astragal, zigzag, acanthus, cartouche, pilaster, bead, beading, champleve ware, cloisonne ware, frost work, Moresque, Morisco, tooling, embroidery, brocade, brocatelle, galloon, lace, fringe, trapping, border, edging, trimming, hanging, tapestry, arras, millinery, ermine, drap d'or, wreath, festoon, garland, chaplet, flower, nosegay, bouquet, posy, daisies pied and violets blue, tassel knot, shoulder knot, apaulette, epaulet, aigulet, frog, star, rosette, bow, feather, plume, pompom, panache, aigrette, finery, frippery, gewgaw, gimcrack, tinsel, spangle, clinquant, pinchbeck, paste, excess of ornament, gaud, pride, illustration, illumination, vignette, fleuron, head piece, tail piece, cul-de-lampe, flowers of rhetoric, work of art, ornamented, beautified, ornate, rich, gilt, begilt, tesselated, festooned, champleve, cloisonne, topiary, smart, gay, trickly, flowery, glittering, new gilt, new spangled, fine as a Mayday queen, fine as a fivepence, fine as a carrot fresh scraped, pranked out, bedight, well-groomed, in full dress, dressed to kill, dressed to the nines, dressed to advantage, in Sunday best, en grand tenue, en grande toilette, in best bib and tucker, endimanche, showy, flashy, gaudy, garish, gairish, gorgeous, ornamental, decorative, becoming.