legionary ant vs ant

legionary ant and ant both are nouns.

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

As nouns, ant is a hypernym of legionary ant; that is, ant is a word with a broader meaning than legionary ant:

legionary ant: tropical nomadic ant that preys mainly on other insects
ant: social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers

Other hypernyms of legionary ant include emmet, pismire.

legionary ant (noun)	ant (noun)
tropical nomadic ant that preys mainly on other insects	social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers