The phrase "assortment of nations" is correct and usable in written English.
It can be used to describe a diverse collection or variety of different countries or nations.
Example: "The conference brought together an assortment of nations to discuss global climate change initiatives."
Alternatives: "variety of nations" or "collection of nations".
This brings us to another factor that can make American entrepreneurs less globally minded: the relative geographic and cultural isolation of the U.S. We don't have a wide assortment of nearby neighbors, as nations in, say, Europe do.
One last place for the poor is the Tenderloin, where 10,000 Indochinese refugees live, along with an assortment of others from war- and famine-plagued nations, many hundreds of elderly and an uncounted number of derelicts.
Consumers lured by clearance sales and a fresh assortment of spring apparel gave many of the nation's retailers solid January sales despite late-month snowstorms in the Midwest and Northeast.
When pressed, the button will send you a box with a random assortment of small-batch candy made by "artisans from across the nation".
An assortment of health nuts and Luddites became convinced that the hormone would poison the nation's milk supply.
Actually that's Mr. Terkel as channeled by Ms. Smith, who is famous for her one-woman shows in which she portrays an assortment of real people whom she has interviewed to create mosaic portraits of the state of a nation.
This change is expected to cost the nation an additional $2.5 billion a year -- money that could have gone to modernize factories or improve the assortment of goods in stores.
So does the food, with an assortment of quiches and other dishes that recall a time when Brie and mousse represented an exciting stretching of the nation's culinary bounds.
A motley assortment of enterprises reopened.
(Jay Russell plays an assortment of other roles).
