OXFORD DICTIONARY
forth, adv. archaic except in set phrases and after certain verbs, esp. bring, come, go, and set 1 forward; into view.
2 onwards in time (from this time forth; henceforth).
3 forwards.
4 out from a starting-point (set forth).
and so forth and so on; and the like.
OE f. Gmc
THESAURUS
forth
ahead, alee, along, away, en route to, for, forward, forwards, hence, off, on, onward, onwards, out, outward, outwardly, outwards, thence, therefrom, thereof, whence
ROGET THESAURUS
forth
Progression
N
progress, progression, progressiveness, advancing, advance, advancement, ongoing, flood, tide, headway, march, rise, improvement, advancing, progressive, profluent, advanced, forward, onward,
forth, on, ahead, under way, en route for, on one's way, on the way, on the road, on the high road, on the road to, in progress, in mid progress, in transitu, vestigia nulla retrorsum, westward the course of empire takes its way.