Some common synonyms of knowledge are erudition, learning, and scholarship. While all these words mean "what is or can be known by an individual or by humankind," knowledge applies to facts or ideas acquired by study, investigation, observation, or experience.

// rich in the knowledge of human nature

The words learning and knowledge are synonyms, but do differ in nuance. Specifically, learning applies to knowledge acquired especially through formal, often advanced, schooling.

// a book that demonstrates vast learning

While in some cases nearly identical to knowledge, erudition strongly implies the acquiring of profound, recondite, or bookish learning.

// an erudition unusual even in a scholar