armoured personnel carrier vs armored personnel carrier

armoured personnel carrier and armored personnel carrier both are nouns.

Word	Noun	Adjective	Verb	Adverb
armoured personnel carrier	Yes	No	No	No
armored personnel carrier	Yes	No	No	No

As nouns, armoured personnel carrier and armored personnel carrier are synonyms defined as:

armoured personnel carrier and armored personnel carrier: (military) an armored vehicle (usually equipped with caterpillar treads) that is used to transport infantry

Other synonyms of armoured personnel carrier include APC.

armoured personnel carrier (noun)	armored personnel carrier (noun)
(military) an armored vehicle (usually equipped with caterpillar treads) that is used to transport infantry	(military) an armored vehicle (usually equipped with caterpillar treads) that is used to transport infantry