shamrock vs oxalis

shamrock and oxalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
shamrock	Yes	No	No	No
oxalis	Yes	No	No	No

As nouns, oxalis is a hypernym of shamrock; that is, oxalis is a word with a broader meaning than shamrock:

shamrock: Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers
oxalis: any plant or flower of the genus Oxalis

Other hypernyms of shamrock include sorrel, wood sorrel.

shamrock (noun)	oxalis (noun)
clover native to Ireland with yellowish flowers; often considered the true or original shamrock	any plant or flower of the genus Oxalis
creeping European clover having white to pink flowers and bright green leaves; naturalized in United States; widely grown for forage
Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers