bathroom tissue vs toilet tissue

bathroom tissue and toilet tissue both are nouns.

Word	Noun	Adjective	Verb	Adverb
bathroom tissue	Yes	No	No	No
toilet tissue	Yes	No	No	No

As nouns, bathroom tissue and toilet tissue are synonyms defined as:

bathroom tissue and toilet tissue: a soft thin absorbent paper for use in toilets

Other synonyms of bathroom tissue include toilet paper.

bathroom tissue (noun)	toilet tissue (noun)
a soft thin absorbent paper for use in toilets	a soft thin absorbent paper for use in toilets