European blackbird vs thrush

European blackbird and thrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
European blackbird	Yes	No	No	No
thrush	Yes	No	No	No

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

European blackbird: common black European thrush
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

European blackbird (noun)	thrush (noun)
common black European thrush	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