come along vs gleam

come along is not a noun while gleam is a noun.

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

As verbs, gleam is a hyponym of come along; that is, gleam is a word with a more specific, narrower meaning than come along:

Other hyponyms of come along include fulminate, occur.

come along (noun)	gleam (noun)
	an appearance of reflected light
	a flash of light (especially reflected light)

come along (verb)	gleam (verb)
come into being or existence, or appear on the scene	to shine with faint or brief light
develop in a positive way	shine brightly, like a star or a light
	be shiny, as if wet