What is a close synonym for "learned"?

There are only three synonyms for "learning": knowledge, learning, common sense.

Knowledge: Pronunciation: zhī shi.

Explanation: 1). The knowledge and experience that people gain in practice2). People who know; friends3).? Refers to the culture and scholarship concerned 4)...? To know; to understand.

Word class: noun.

Sentence-making: knowledge is the connection between concepts.

Scholarship: Pronunciation: xué shí.

Explanation: scholarship is learning, academic knowledge and cultivation and the ability to judge things accurately.

Word Class: noun.

Conjugation: professor Zhou is a learned and first-rate expert in electrical engineering.

Common knowledge: pronunciation: ?cháng shí.

Explanation: ordinary knowledge; general knowledge.

Word Class: noun.

Construction: we should know all this common knowledge.