Synonyms of fundamentally

2 Syllables

well-nigh

3 Syllables

pressingly, centrally, inwardly, vitally, virtually

4 Syllables

cardinally, exigently, principally, guesstimate, practically, importantly, effectually, dominantly, prevailingly, prevalently, essentially, sequentially, primarily, radically

5 Syllables

inescapably, ineluctably, irresistibly, climactically, necessarily, intrinsically, inexorably, ultimately, significantly

6 Syllables

determinately, axiomatically, incontrovertibly, automatically