forward motion vs onward motion

forward motion and onward motion both are nouns.

Word	Noun	Adjective	Verb	Adverb
forward motion	Yes	No	No	No
onward motion	Yes	No	No	No

As nouns, forward motion and onward motion are synonyms defined as:

forward motion and onward motion: the act of moving forward (as toward a goal)

Other synonyms of forward motion include advance, advancement, procession, progress, progression.

forward motion (noun)	onward motion (noun)
the act of moving forward (as toward a goal)	the act of moving forward (as toward a goal)