come along vs leapfrog

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

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

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

Other hyponyms of come along include climb.

come along (noun)	leapfrog (noun)
	a game in which one child bends down and another leaps over
	advancing as if in the child's game, by leaping over obstacles or competitors

come along (verb)	leapfrog (verb)
come into being or existence, or appear on the scene	progress by large jumps instead of small increments
develop in a positive way	to vault