Synonyms of substantially

1 Syllable

much

2 Syllables

really, stably, amply, almost, mainly, firmly

3 Syllables

palpably, tangibly, heavily, durably, largely, plenteously

4 Syllables

corporeally, mundanely, ponderably, materially, physically, unshakeably, importantly, dominantly, prevailingly, prevalently, luxuriantly, essentially, appreciably, capaciously, plentifully, principally

5 Syllables

considerably, astonishingly, extensively, indispensably

6 Syllables

determinately, exaggeratedly