come forward vs step forward

come forward and step forward both are verbs.

Word	Noun	Adjective	Verb	Adverb
come forward	No	No	Yes	No
step forward	No	No	Yes	No

As verbs, come forward and step forward are synonyms defined as:

Other synonyms of come forward include come out, come to the fore, step to the fore, step up.

come forward (verb)	step forward (verb)
make oneself visible; take action	make oneself visible; take action