common wood sorrel vs oxalis

common wood sorrel and oxalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
common wood sorrel	Yes	No	No	No
oxalis	Yes	No	No	No

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

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

Other hypernyms of common wood sorrel include sorrel, wood sorrel.

common wood sorrel (noun)	oxalis (noun)
Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers	any plant or flower of the genus Oxalis