legionary ant vs army ant

legionary ant and army ant both are nouns.

Word	Noun	Adjective	Verb	Adverb
legionary ant	Yes	No	No	No
army ant	Yes	No	No	No

As nouns, legionary ant and army ant are synonyms defined as:

legionary ant and army ant: tropical nomadic ant that preys mainly on other insects

Other synonyms of legionary ant include driver ant.

legionary ant (noun)	army ant (noun)
tropical nomadic ant that preys mainly on other insects	tropical nomadic ant that preys mainly on other insects