kingcup vs water dragon

kingcup and water dragon both are nouns.

Word	Noun	Adjective	Verb	Adverb
kingcup	Yes	No	No	No
water dragon	Yes	No	No	No

As nouns, kingcup and water dragon are synonyms defined as:

kingcup and water dragon: swamp plant of Europe and North America having bright yellow flowers resembling buttercups

Other synonyms of kingcup include Caltha palustris, cowslip, marsh marigold, May blob, meadow bright.

kingcup (noun)	water dragon (noun)
any of various plants of the genus Ranunculus	swamp plant of Europe and North America having bright yellow flowers resembling buttercups
swamp plant of Europe and North America having bright yellow flowers resembling buttercups	North American herbaceous perennial of wet places having slender curled racemes of small white flowers