A person promotes a scheme or an enterprise which others have projected or begun, and which he encourages, forwards, furthers, pushes, or urges on, especially when he acts as the agent of the prime movers and supporters of the enterprise.

J. C. Fernald, English Synonyms and Antonyms (1914)

Example sentences

ahead We all know that Mendel was way ahead of his time.
onwards I will follow your advice fully from here onwards.
onward From that day onward, Saul considered David his enemy.

Popularity over time

Word	1850 → 2019	Trend
forwards		rising
ahead		rising
onwards		steady
onward		rising
forrader		steady
frontwards		steady

Use in printed books, per decade from 1850 to 2019.

By length

5 letters: ahead²
6 letters: onward², forrad
7 letters: onwards², forrard
8 letters: forrader
9 letters: frontward
10 letters: frontwards

The small number after each word is its number of syllables (ahead² = 2 syllables).