padding vs artifact

padding and artifact both are nouns.

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

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

padding: artifact consisting of soft or resilient material used to fill or give shape or protect or add comfort
artifact: a man-made object taken as a whole

Other hypernyms of padding include artefact.

padding (noun)	artifact (noun)
artifact consisting of soft or resilient material used to fill or give shape or protect or add comfort	a man-made object taken as a whole