flowering hazel vs winter hazel

flowering hazel and winter hazel both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowering hazel	Yes	No	No	No
winter hazel	Yes	No	No	No

As nouns, flowering hazel and winter hazel are synonyms defined as:

flowering hazel and winter hazel: any of several Asiatic deciduous shrubs cultivated for their nodding racemes of yellow flowers that appear before the leaves

flowering hazel (noun)	winter hazel (noun)
any of several Asiatic deciduous shrubs cultivated for their nodding racemes of yellow flowers that appear before the leaves	any of several Asiatic deciduous shrubs cultivated for their nodding racemes of yellow flowers that appear before the leaves