modify vs modification

modify is not a noun while modification is a noun.

Word	Noun	Adjective	Verb	Adverb
modify	No	No	Yes	No
modification	Yes	No	No	No

modify (noun)	modification (noun)
	the act of making something different (as e.g. the size of a garment)
	slightly modified copy; not an exact copy
	an event that occurs when something passes from one state or phase to another
	the grammatical relation that exists when a word qualifies the meaning of the phrase

modify (verb)	modification (verb)
make less severe or harsh or extreme
add a modifier to a constituent
cause to change; make different; cause a transformation