origin, n. [source], [beginning], derivation, [rise], origination.

original, a. [first], primeval, aboriginal, [primitive], archetypal, primordial, pristine; [creative], productive, inventive, [ingenious]. Antonyms: derivative, copied.

original, n. [origin], archetype, prototype, [model], [pattern].

Orkney Islands. Associated word: Orcadian.

ornament, n. [decoration], [embellishment], [adornment], [garniture], [ornamentation]; parure.

ornament, v. [decorate], [embellish], [garnish], bedeck, [grace], [beautify].

ornamental, a. embellishing, beautifying, garnishing.

ornamentation, n. [adornment], [garniture], [embellishment]; arabesque, moresque; purfling; fret-work.

ornate, a. ornamented, [decorated], embellished, [florid], adorned.

orthodox, a. Antonym: heterodox.