ornament vs artefact

ornament and artefact both are nouns.

Word	Noun	Adjective	Verb	Adverb
ornament	Yes	No	Yes	No
artefact	Yes	No	No	No

As nouns, artefact is a hypernym of ornament; that is, artefact is a word with a broader meaning than ornament:

Other hypernyms of ornament include artifact.

ornament (noun)	artefact (noun)
something used to beautify	a man-made object taken as a whole

ornament (verb)	artefact (verb)
make more attractive by adding ornament, colour, etc.
be an ornament to