defense policy vs defence policy

defense policy and defence policy both are nouns.

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

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

defense policy and defence policy: a program for defending a country against its enemies

Other synonyms of defense policy include defence program, defense program.

defense policy (noun)	defence policy (noun)
a program for defending a country against its enemies	a program for defending a country against its enemies