hawthorn vs shrub

hawthorn and shrub both are nouns.

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

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

Other hypernyms of hawthorn include bush.

hawthorn (noun)	shrub (noun)
a spring-flowering shrub or small tree of the genus Crataegus	a low woody perennial plant usually having several major stems