Clethra alnifolia vs sweet pepperbush

Clethra alnifolia and sweet pepperbush both are nouns.

Word	Noun	Adjective	Verb	Adverb
Clethra alnifolia	Yes	No	No	No
sweet pepperbush	Yes	No	No	No

As nouns, Clethra alnifolia and sweet pepperbush are synonyms defined as:

Clethra alnifolia and sweet pepperbush: shrub of eastern and southern coastal United States having beautiful racemes of spice-scented white flowers

Other synonyms of Clethra alnifolia include pepper bush, summer sweet, white alder.

Clethra alnifolia (noun)	sweet pepperbush (noun)
shrub of eastern and southern coastal United States having beautiful racemes of spice-scented white flowers	shrub of eastern and southern coastal United States having beautiful racemes of spice-scented white flowers