onwards vs forwards

onwards and forwards both are adverbs.

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

As adverbs, onwards and forwards are synonyms defined as:

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

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