replace vs replacing

replace is not a noun while replacing is a noun.

Word	Noun	Adjective	Verb	Adverb
replace	No	No	Yes	No
replacing	Yes	No	No	No

replace (noun)	replacing (noun)
	the act of furnishing an equivalent person or thing in the place of another

replace (verb)	replacing (verb)
substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected)
put something back where it belongs
put in the place of another; switch seemingly equivalent items
take the place or move into the position of