the act or process of diversifying; state of being diversified.

the act or practice of manufacturing a variety of products, investing in a variety of securities, selling a variety of merchandise, etc., so that a failure in or an economic slump affecting one of them will not be disastrous.

noun

diverseness , diversity , heterogeneity , heterogeneousness , miscellaneousness , multifariousness , multiformity , multiplicity , variegation , variousness