Hydrangea paniculata vs fall-blooming hydrangea

Hydrangea paniculata and fall-blooming hydrangea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hydrangea paniculata	Yes	No	No	No
fall-blooming hydrangea	Yes	No	No	No

As nouns, Hydrangea paniculata and fall-blooming hydrangea are synonyms defined as:

Hydrangea paniculata and fall-blooming hydrangea: deciduous shrub or small tree with pyramidal flower clusters

Hydrangea paniculata (noun)	fall-blooming hydrangea (noun)
deciduous shrub or small tree with pyramidal flower clusters	deciduous shrub or small tree with pyramidal flower clusters