bath soap vs toilet soap

bath soap and toilet soap both are nouns.

Word	Noun	Adjective	Verb	Adverb
bath soap	Yes	No	No	No
toilet soap	Yes	No	No	No

As nouns, bath soap and toilet soap are synonyms defined as:

Other synonyms of bath soap include face soap.

bath soap (noun)	toilet soap (noun)
soap used as a toiletry	soap used as a toiletry