Canterbury bell vs Campanula medium

Canterbury bell and Campanula medium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Canterbury bell	Yes	No	No	No
Campanula medium	Yes	No	No	No

As nouns, Canterbury bell and Campanula medium are synonyms defined as:

Canterbury bell and Campanula medium: European biennial widely cultivated for its blue or violet or white flowers

Other synonyms of Canterbury bell include cup and saucer.

Canterbury bell (noun)	Campanula medium (noun)
herb of Colombia to Peru having pale purple flowers	European biennial widely cultivated for its blue or violet or white flowers
European biennial widely cultivated for its blue or violet or white flowers