supplementary benefit vs national assistance

supplementary benefit and national assistance both are nouns.

Word	Noun	Adjective	Verb	Adverb
supplementary benefit	Yes	No	No	No
national assistance	Yes	No	No	No

As nouns, supplementary benefit and national assistance are synonyms defined as:

supplementary benefit and national assistance: benefits paid to bring incomes up to minimum levels established by law

Other synonyms of supplementary benefit include social assistance.

supplementary benefit (noun)	national assistance (noun)
benefits paid to bring incomes up to minimum levels established by law	benefits paid to bring incomes up to minimum levels established by law