insurgency vs insurgence

insurgency and insurgence both are nouns.

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

As nouns, insurgency and insurgence are synonyms defined as:

insurgency and insurgence: an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict

insurgency (noun)	insurgence (noun)
an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict	an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict