structural
WordReference English Thesaurus © 2025
Synonyms:
fundamental Collocations, basic Collocations, formative, architectural, constructional, edificial, morphological, syntactic
Antonyms:
trivial Collocations, ancillary Collocations, secondary, superfluous, nonessential, auxiliary, lesser Collocations, minor Collocations, insignificant, thrown together