bath salts vs toilet articles

bath salts and toilet articles both are nouns.

Word	Noun	Adjective	Verb	Adverb
bath salts	Yes	No	No	No
toilet articles	Yes	No	No	No

As nouns, toilet articles is a hypernym of bath salts; that is, toilet articles is a word with a broader meaning than bath salts:

bath salts: a preparation that softens or scents a bath
toilet articles: artifacts used in making your toilet (washing and taking care of your body)

Other hypernyms of bath salts include toiletry.

bath salts (noun)	toilet articles (noun)
a preparation that softens or scents a bath	artifacts used in making your toilet (washing and taking care of your body)