bear's ear vs primula

bear's ear and primula both are nouns.

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

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

bear's ear: yellow-flowered primrose native to Alps; commonly cultivated
primula: 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 primrose.

bear's ear (noun)	primula (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