oxlip vs primrose

oxlip and primrose both are nouns.

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

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

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

oxlip (noun)	primrose (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