distinguish, mark, differentiate -- (be a distinctive feature, attribute, or trait; sometimes in a very positive sense; "His modesty distinguishes him from his peers")
differentiate -- (calculate a derivative; take the derivative)
differentiate -- (become different during development; "cells differentiate")
speciate, differentiate, specialize, specialise -- (evolve so as to lead to a new species or develop in a way most suited to the environment)
differentiate -- (become distinct and acquire a different character)