haw vs hawthorn

haw and hawthorn both are nouns.

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

As nouns, haw and hawthorn are synonyms defined as:

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

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

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