bear's ear vs primrose

bear's ear and primrose both are nouns.

Word	Noun	Adjective	Verb	Adverb
bear's ear	Yes	No	No	No
primrose	Yes	No	No	No

As nouns, primrose is a hypernym of bear's ear; that is, primrose is a word with a broader meaning than bear's ear:

bear's ear: yellow-flowered primrose native to Alps; commonly cultivated
primrose: any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads

Other hypernyms of bear's ear include primula.

bear's ear (noun)	primrose (noun)
yellow-flowered primrose native to Alps; commonly cultivated	any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads