forwards vs onwards

forwards and onwards both are adverbs.

Word	Noun	Adjective	Verb	Adverb
forwards	No	No	No	Yes
onwards	No	No	No	Yes

As adverbs, forwards and onwards are synonyms defined as:

Other synonyms of forwards include ahead, forrader, forward, onward.

forwards (adverb)	onwards (adverb)
in a forward direction	in a forward direction
at or to or toward the front; forward