tar paper vs roofing paper

tar paper and roofing paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
tar paper	Yes	No	No	No
roofing paper	Yes	No	No	No

As nouns, tar paper and roofing paper are synonyms defined as:

tar paper and roofing paper: a heavy paper impregnated with tar and used as part of a roof for waterproofing

tar paper (noun)	roofing paper (noun)
a heavy paper impregnated with tar and used as part of a roof for waterproofing	a heavy paper impregnated with tar and used as part of a roof for waterproofing