step to the fore vs step up

step to the fore and step up both are verbs.

Word	Noun	Adjective	Verb	Adverb
step to the fore	No	No	Yes	No
step up	No	No	Yes	No

As verbs, step to the fore and step up are synonyms defined as:

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

step to the fore (verb)	step up (verb)
make oneself visible; take action	increase in extent or intensity
	speed up
	make oneself visible; take action