decorationIt's time to put away the Christmas decorations.
ornamentationformalThe artifacts included a gold bracelet with beaded ornamentation.
adornmentShe wore no adornments except for a small watch.
embellishmentThe building is plain, avoiding all unnecessary embellishments.
trimmingI want a plain black cardigan with no trimmings.
trimI like that tan sofa with the bright blue trim.
knick-knackThe room was filled with knick-knacks.
tchotchkeUSinformalI love collecting those little promotional tchotchkes you get at conferences.