along vs on

along is not an adjective while on is an adjective.

Word	Noun	Adjective	Verb	Adverb
along	No	No	No	Yes
on	No	Yes	No	Yes

As adverbs, along and on are synonyms defined as:

along (adjective)	on (adjective)
	in operation or operational
	(of events) planned or scheduled

along (adverb)	on (adverb)
in accompaniment or as a companion	with a forward motion
with a forward motion	indicates continuity or persistence or concentration
in addition (usually followed by `with')	in a state required for something to function or be effective
to a more advanced state
in line with a length or direction (often followed by `by' or `beside')