Vastly

adv.

1.

To a vast extent or degree; very greatly; immensely.

Adv.

1.

vastly - to an exceedingly great extent or degree; "He had vastly overestimated his resources"; "was immensely more important to the project as a scientist than as an administrator" Synonyms: immensely

abroad, almost entirely, broadly, colossally, considerably, enormously, exceedingly, extensively, extremely, far and near, far and wide, gigantically, greatly, hugely, immensely, infinitely, on all sides, on every side, prodigiously, right and left, stupendously, substantially, titanically, tremendously, very much, widely, worlds