joining vs change of integrity

joining and change of integrity both are nouns.

Word	Noun	Adjective	Verb	Adverb
joining	Yes	No	No	No
change of integrity	Yes	No	No	No

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

joining: the act of bringing two things into contact (especially for communication)
change of integrity: the act of changing the unity or wholeness of something

joining (noun)	change of integrity (noun)
the act of bringing two things into contact (especially for communication)	the act of changing the unity or wholeness of something