self-control vs self-possession

self-control and self-possession both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-control	Yes	No	No	No
self-possession	Yes	No	No	No

As nouns, self-control and self-possession are synonyms defined as:

self-control and self-possession: the trait of resolutely controlling your own behavior

Other synonyms of self-control include possession, self-command, self-will, will power, willpower.

self-control (noun)	self-possession (noun)
the act of denying yourself; controlling your impulses	the trait of resolutely controlling your own behavior
the trait of resolutely controlling your own behavior