Roman basilica vs basilica

Roman basilica and basilica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Roman basilica	Yes	No	No	No
basilica	Yes	No	No	No

As nouns, Roman basilica and basilica are synonyms defined as:

Roman basilica and basilica: a Roman building used for public administration

Roman basilica (noun)	basilica (noun)
a Roman building used for public administration	a Roman building used for public administration
	an early Christian church designed like a Roman basilica; or a Roman Catholic church or cathedral accorded certain privileges