witch hazel vs wych hazel plant

witch hazel and wych hazel plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
witch hazel	Yes	No	No	No
wych hazel plant	Yes	No	No	No

As nouns, witch hazel and wych hazel plant are synonyms defined as:

witch hazel and wych hazel plant: any of several shrubs or trees of the genus Hamamelis; bark yields an astringent lotion

Other synonyms of witch hazel include witch hazel plant, wych hazel.

witch hazel (noun)	wych hazel plant (noun)
lotion consisting of an astringent alcoholic solution containing an extract from the witch hazel plant	any of several shrubs or trees of the genus Hamamelis; bark yields an astringent lotion
any of several shrubs or trees of the genus Hamamelis; bark yields an astringent lotion