hawthorn vs haw

hawthorn and haw both are nouns.

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

As nouns, hawthorn and haw are synonyms defined as:

hawthorn and haw: a spring-flowering shrub or small tree of the genus Crataegus

hawthorn (noun)	haw (noun)
a spring-flowering shrub or small tree of the genus Crataegus	the nictitating membrane of a horse
	a spring-flowering shrub or small tree of the genus Crataegus

hawthorn (verb)	haw (verb)
	utter `haw'