defence program vs defense program

defence program and defense program both are nouns.

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

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

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

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

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