roof rat vs black rat

roof rat and black rat both are nouns.

Word	Noun	Adjective	Verb	Adverb
roof rat	Yes	No	No	No
black rat	Yes	No	No	No

As nouns, roof rat and black rat are synonyms defined as:

roof rat and black rat: common household pest originally from Asia that has spread worldwide

Other synonyms of roof rat include Rattus rattus.

roof rat (noun)	black rat (noun)
common household pest originally from Asia that has spread worldwide	common household pest originally from Asia that has spread worldwide