"rich endowment" is a grammatically correct phrase in written English.
It is typically used to describe someone who possesses a large amount of talent or natural abilities. Example: Despite being born into poverty, John's rich endowment of intelligence and determination helped him become a successful lawyer.
Britain enjoys a rich endowment of trees.
We have a rich endowment of energy, minerals, water and arable land as well as considerable openness to immigrants who are responsible for a disproportionate amount of innovation.
Another factor was the quest to control Congo's unusually rich endowment of minerals and farmland, especially here in North Kivu Province.
América Móvil begins life without some of the best known of Mr. Slim's associates on its board, but not without a rich endowment from Telmex.
All five cases achieved moments of extremely high levels of per capita GDP because of an exceptionally rich endowment of natural resources per person.
India is a rich endowment of nature.
Temples in India often have rich endowments, mainly from donations of gold and cash by pilgrims and wealthy patrons, but the wealth discovered at Padmanabhaswamy dwarfs the known assets of every other Indian temple.
As far as charity goes, the rich endowments of All Souls include the freehold of Kensal Rise Library, the branch shamefully shut, stripped and plundered at dead of night (down to the plaque that marked its opening by Mark Twain in 1900) by the most grossly philistine Labour council in Britain: Brent.
With their rich endowments and storied histories, a select group of colleges including Harvard, Stanford, MIT and Caltech along with Oxford and Cambridge in the U.K., as well as the University of Tokyo routinely place in the top 10 spots of prestigious lists of universities.
Myanmar's economic potential is immense given its rich endowments and geographic advantages.
Even if they have the best of intentions (and most don't), they're at a significant competitive disadvantage to their non-profit peers: they have to pay taxes, don't benefit from rich endowments and donations, and generally don't own millions of dollars worth of real estate free and clear: their cost of capital is far, far higher than non-profits.
