armoured combat vehicle vs army tank

armoured combat vehicle and army tank both are nouns.

Word	Noun	Adjective	Verb	Adverb
armoured combat vehicle	Yes	No	No	No
army tank	Yes	No	No	No

As nouns, armoured combat vehicle and army tank are synonyms defined as:

armoured combat vehicle and army tank: an enclosed armored military vehicle; has a cannon and moves on caterpillar treads

Other synonyms of armoured combat vehicle include armored combat vehicle, tank.

armoured combat vehicle (noun)	army tank (noun)
an enclosed armored military vehicle; has a cannon and moves on caterpillar treads	an enclosed armored military vehicle; has a cannon and moves on caterpillar treads