further

[1]	foster
[2]	promote , advance , boost , encourage
[3]	advance , promote , favour , push/urge onward(s)/forward(s) , forward , foster , back , patronize , support , help , assist , aid

adv.

[1]	furthermore , besides , moreover , too , also , additionally , in addition , over and above , beyond , above , what is more , to boot , yet , then (again) , again
[2]	farther , farther , at/to a greater distance/depth
[3]	farther

adj.

[1]	more , additional , another , other , new , supplemental , supplementary , accessory , auxiliary , extra , spare , fresh
[2]	farther , more distant/remote
[3]	farther