American robin vs thrush

American robin and thrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
American robin	Yes	No	No	No
thrush	Yes	No	No	No

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

American robin: large American thrush having a rust-red breast and abdomen
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

American robin (noun)	thrush (noun)
large American thrush having a rust-red breast and abdomen	songbirds characteristically having brownish upper plumage with a spotted breast
	a woman who sings popular songs
	candidiasis of the oral cavity; seen mostly in infants or debilitated adults