paramilitary organization vs paramilitary organisation

paramilitary organization and paramilitary organisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
paramilitary organization	Yes	No	No	No
paramilitary organisation	Yes	No	No	No

As nouns, paramilitary organization and paramilitary organisation are synonyms defined as:

paramilitary organization and paramilitary organisation: a group of civilians organized in a military fashion (especially to operate in place of or to assist regular army troops)

Other synonyms of paramilitary organization include paramilitary, paramilitary force, paramilitary unit.

paramilitary organization (noun)	paramilitary organisation (noun)
a group of civilians organized in a military fashion (especially to operate in place of or to assist regular army troops)	a group of civilians organized in a military fashion (especially to operate in place of or to assist regular army troops)