Being an addition: added, additional, extra, fresh, more, new, other. See increase
In addition: additionally, also, besides, furthermore, item, likewise, more, moreover, still, too, yet. Idioms: as well, to boot. See increase
To cause to move forward or upward, as toward a goal: advance, forward, promote. See forward, help
Another word for further
To a greater distance
farther, more remote, at a greater distance; see distant 2, farther.
additional, more, moreover; see besides, extra.