oxlip vs primula

oxlip and primula both are nouns.

Word	Noun	Adjective	Verb	Adverb
oxlip	Yes	No	No	No
primula	Yes	No	No	No

As nouns, primula is a hypernym of oxlip; that is, primula is a word with a broader meaning than oxlip:

oxlip: Eurasian primrose with yellow flowers clustered in a one-sided umbel
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 oxlip include primrose.

oxlip (noun)	primula (noun)
Eurasian primrose with yellow flowers clustered in a one-sided umbel	any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads