replacement vs replace

replacement is a noun but replace is not a noun.

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

replacement (noun)	replace (noun)
the act of furnishing an equivalent person or thing in the place of another
a person or thing that takes or can take the place of another
an event in which one thing is substituted for another
a person who follows next in order
someone who takes the place of another person
filling again by supplying what has been used up

replacement (verb)	replace (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