endowment vs natural endowment

endowment and natural endowment both are nouns.

Word	Noun	Adjective	Verb	Adverb
endowment	Yes	No	No	No
natural endowment	Yes	No	No	No

As nouns, endowment and natural endowment are synonyms defined as:

Other synonyms of endowment include gift, talent.

endowment (noun)	natural endowment (noun)
the act of endowing with a permanent source of income	natural abilities or qualities
natural abilities or qualities
the capital that provides income for an institution