step down vs top out

step down and top out both are verbs.

Word	Noun	Adjective	Verb	Adverb
step down	No	No	Yes	No
top out	No	No	Yes	No

As verbs, top out is a hyponym of step down; that is, top out is a word with a more specific, narrower meaning than step down:

Other hyponyms of step down include give up, renounce, resign, vacate, retire, fall.

step down (verb)	top out (verb)
reduce the level or intensity or size or scope of	to reach the highest point; attain maximum intensity, activity
give up or retire from a position	provide with a top or finish the top (of a structure)
	give up one's career just as one becomes very successful