will power vs self-command

will power and self-command both are nouns.

Word	Noun	Adjective	Verb	Adverb
will power	Yes	No	No	No
self-command	Yes	No	No	No

As nouns, will power and self-command are synonyms defined as:

will power and self-command: the trait of resolutely controlling your own behavior

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

will power (noun)	self-command (noun)
the trait of resolutely controlling your own behavior	the trait of resolutely controlling your own behavior