APC vs armored personnel carrier

APC and armored personnel carrier both are nouns.

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

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

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

Other synonyms of APC include armoured personnel carrier.

APC (noun)	armored personnel carrier (noun)
a drug combination found in some over-the-counter headache remedies (aspirin and phenacetin and caffeine)	(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