on vs along

on is an adjective but along is not an adjective.

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

As adverbs, on and along are synonyms defined as:

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

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