great anteater vs giant anteater

great anteater and giant anteater both are nouns.

Word	Noun	Adjective	Verb	Adverb
great anteater	Yes	No	No	No
giant anteater	Yes	No	No	No

As nouns, great anteater and giant anteater are synonyms defined as:

great anteater and giant anteater: large shaggy-haired toothless anteater with long tongue and powerful claws; of South America

Other synonyms of great anteater include ant bear, Myrmecophaga jubata, tamanoir.

great anteater (noun)	giant anteater (noun)
large shaggy-haired toothless anteater with long tongue and powerful claws; of South America	large shaggy-haired toothless anteater with long tongue and powerful claws; of South America