go along vs play along

go along and play along both are verbs.

Word	Noun	Adjective	Verb	Adverb
go along	No	No	Yes	No
play along	No	No	Yes	No

As verbs, go along and play along are synonyms defined as:

go along (verb)	play along (verb)
for time to move forward	perform an accompaniment to
cooperate or pretend to cooperate	cooperate or pretend to cooperate
continue a certain state, condition, or activity