mayflower vs shrub

mayflower and shrub both are nouns.

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

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

mayflower: low-growing evergreen shrub of eastern North America with leathery leaves and clusters of fragrant pink or white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of mayflower include bush.

mayflower (noun)	shrub (noun)
low-growing evergreen shrub of eastern North America with leathery leaves and clusters of fragrant pink or white flowers	a low woody perennial plant usually having several major stems