increase vs change of magnitude

increase and change of magnitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
increase	Yes	No	Yes	No
change of magnitude	Yes	No	No	No

As nouns, change of magnitude is a hypernym of increase; that is, change of magnitude is a word with a broader meaning than increase:

increase (noun)	change of magnitude (noun)
the act of increasing something	the act of changing the amount or size of something
the amount by which something increases
a change resulting in an increase
a process of becoming larger or longer or more numerous or more important
a quantity that is added

increase (verb)	change of magnitude (verb)
become bigger or greater in amount
make bigger or more