yellow bells vs whispering bells

yellow bells and whispering bells both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow bells	Yes	No	No	No
whispering bells	Yes	No	No	No

As nouns, yellow bells and whispering bells are synonyms defined as:

yellow bells and whispering bells: viscid herb of arid or desert habitats of southwestern United States having pendulous yellow flowers

Other synonyms of yellow bells include California yellow bells, Emmanthe penduliflora.

yellow bells (noun)	whispering bells (noun)
viscid herb of arid or desert habitats of southwestern United States having pendulous yellow flowers	viscid herb of arid or desert habitats of southwestern United States having pendulous yellow flowers