othonna vs shrub

othonna and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
othonna	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of othonna; that is, shrub is a word with a broader meaning than othonna:

othonna: a South African plant of the genus Othonna having smooth often fleshy leaves and heads of yellow flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of othonna include bush.

othonna (noun)	shrub (noun)
a South African plant of the genus Othonna having smooth often fleshy leaves and heads of yellow flowers	a low woody perennial plant usually having several major stems