American bittersweet vs climbing bittersweet

American bittersweet and climbing bittersweet both are nouns.

Word	Noun	Adjective	Verb	Adverb
American bittersweet	Yes	No	No	No
climbing bittersweet	Yes	No	No	No

As nouns, American bittersweet and climbing bittersweet are synonyms defined as:

American bittersweet and climbing bittersweet: twining shrub of North America having yellow capsules enclosing scarlet seeds

Other synonyms of American bittersweet include bittersweet, Celastrus scandens, false bittersweet, shrubby bittersweet, staff vine, waxwork.

American bittersweet (noun)	climbing bittersweet (noun)
twining shrub of North America having yellow capsules enclosing scarlet seeds	twining shrub of North America having yellow capsules enclosing scarlet seeds