ornamentation vs artifact

ornamentation and artifact both are nouns.

Word	Noun	Adjective	Verb	Adverb
ornamentation	Yes	No	No	No
artifact	Yes	No	No	No

As nouns, artifact is a hypernym of ornamentation; that is, artifact is a word with a broader meaning than ornamentation:

Other hypernyms of ornamentation include artefact.

ornamentation (noun)	artifact (noun)
the act of adding extraneous decorations to something	a man-made object taken as a whole
something used to beautify
the state of being ornamented