forwards vs onward

forwards and onward both are adverbs.

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

As adverbs, forwards and onward are synonyms defined as:

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

forwards (adverb)	onward (adverb)
in a forward direction	forward in time or order or degree
at or to or toward the front; forward	in a forward direction