Semantic fields
AKA conceptual field, a semantic domain, a lexical field, or a lexical domain
‘groups together word senses that are related by virtue of their being connected at some level of generality with the same mental concept’
Not only synonymy and antonymy but also hypernymy and hyponymy
E.g. EDUCATION: academic, coaching, coursework, deputy head, exams, PhD, playschool, revision notes, studious, swot, viva