defense force vs defence force

defense force and defence force both are nouns.

Word	Noun	Adjective	Verb	Adverb
defense force	Yes	No	No	No
defence force	Yes	No	No	No

As nouns, defense force and defence force are synonyms defined as:

defense force and defence force: an organization of defenders that provides resistance against attack

Other synonyms of defense force include defence, defense.

defense force (noun)	defence force (noun)
an organization of defenders that provides resistance against attack	an organization of defenders that provides resistance against attack