summer sweet vs Clethra alnifolia

summer sweet and Clethra alnifolia both are nouns.

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

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

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

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

summer sweet (noun)	Clethra alnifolia (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