insurgency vs insurrection

insurgency and insurrection both are nouns.

Word	Noun	Adjective	Verb	Adverb
insurgency	Yes	No	No	No
insurrection	Yes	No	No	No

As nouns, insurrection is a hypernym of insurgency; that is, insurrection is a word with a broader meaning than insurgency:

insurgency: an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict
insurrection: organized opposition to authority; a conflict in which one faction tries to wrest control from another

Other hypernyms of insurgency include rebellion, revolt, rising, uprising.

insurgency (noun)	insurrection (noun)
an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict	organized opposition to authority; a conflict in which one faction tries to wrest control from another