bluethroat vs thrush

bluethroat and thrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
bluethroat	Yes	No	No	No
thrush	Yes	No	No	No

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

bluethroat: songbird of northern Europe and Asia
thrush: songbirds characteristically having brownish upper plumage with a spotted breast

bluethroat (noun)	thrush (noun)
songbird of northern Europe and Asia	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