change form vs come out

change form and come out both are verbs.

Word	Noun	Adjective	Verb	Adverb
change form	No	No	Yes	No
come out	No	No	Yes	No

As verbs, come out is a hyponym of change form; that is, come out is a word with a more specific, narrower meaning than change form:

change form (verb)	come out (verb)
assume a different shape or form	appear or become visible; make a showing
	be issued or published
	break out
	come out of
	take a place in a competition; often followed by an ordinal
	be made known; be disclosed or revealed
	to state openly and publicly one's homosexuality
	bulge outward
	make oneself visible; take action
	drop out
	result or end