Synonyms of chiefly

2 Syllables

broadly, mainly, mostly

3 Syllables

copiously, largely, usually, overall

4 Syllables

especially, principally, liberally, importantly, dominantly, prevailingly, prevalently, commodiously, essentially, primarily, prodigiously, imposingly, prodigally, generally

5 Syllables

unaccountably, expansively, predominantly, voluminously, extravagantly

6 Syllables

determinately, uncustomarily, comprehensively, immoderately