Meaning
Furtherance is the translation of prokope, "a going forward," "advance" (Php 1:12, "the furtherance of the gospel," the Revised Version (British and American) "progress" Php 1:25, "for your furtherance and joy," the Revised Version (British and American) "progress").
Furthermore is the translation of eita, "then," "so then" (Heb 12:9); of to loipon, "for the rest," or "as to the rest" (1Th 4:1, the Revised Version (British and American) "finally then").
Revised Version omits "further" (Ac 12:3); has "further" for "more than right" (Job 34:23), for "farther thence" (Mr 1:19, different text); "What further need have we of witnesses?" for "What need we any further witnesses?" (Mr 14:63); "your fellowship in furtherance of the gospel" (Phi 1:5, Phi 2:22); "to the furthest bound" for "all perfection" (Job 28:3).
W. L. Walker