ant thrush vs antbird

ant thrush and antbird both are nouns.

Word	Noun	Adjective	Verb	Adverb
ant thrush	Yes	No	No	No
antbird	Yes	No	No	No

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

ant thrush: a kind of antbird, with species spanning the genera Formicarius and Chamaeza
antbird: any of various dull-colored South American birds that feeding on ants some following army ant swarms

Other hypernyms of ant thrush include ant bird.

ant thrush (noun)	antbird (noun)
a kind of antbird, with species spanning the genera Formicarius and Chamaeza	any of various dull-colored South American birds that feeding on ants some following army ant swarms