Cambridge Academic Content Dictionary Online

: Some editions offer word maps—visual representations of related concepts—to help you build a broader vocabulary. Definitions & Meanings - Cambridge English Dictionary

Empirical data, empirical research, empirical study. How to Use the Dictionary Effectively Cambridge Academic Content Dictionary

: Look for common word pairings (e.g., "conduct research" or "academic performance") to make your writing sound more natural and professional. : Some editions offer word maps—visual representations of

Based on what is experienced or seen rather than on theory. Cambridge Academic Content Dictionary