onward motion vs forward motion

onward motion and forward motion both are nouns.

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

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

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

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

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