come along vs appear

come along and appear both are verbs.

Word	Noun	Adjective	Verb	Adverb
come along	No	No	Yes	No
appear	No	No	Yes	No

As verbs, come along and appear are synonyms defined as:

come along and appear: come into being or existence, or appear on the scene

come along (verb)	appear (verb)
come into being or existence, or appear on the scene	come into sight or view
develop in a positive way	be issued or published
	come into being or existence, or appear on the scene
	appear as a character on stage or appear in a play, etc.
	give a certain impression of being something or having a certain aspect
	(of a proposition) seem to be true, probable, or apparent
	present oneself formally, as before a (judicial) authority