decoration vs artifact

decoration and artifact both are nouns.

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

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

Other hypernyms of decoration include artefact.

decoration (noun)	artifact (noun)
the act of decorating something (in the hope of making it more attractive)	a man-made object taken as a whole
something used to beautify
an award for winning a championship or commemorating some other event