water dragon vs Caltha palustris

water dragon and Caltha palustris both are nouns.

Word	Noun	Adjective	Verb	Adverb
water dragon	Yes	No	No	No
Caltha palustris	Yes	No	No	No

As nouns, water dragon and Caltha palustris are synonyms defined as:

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

Other synonyms of water dragon include cowslip, kingcup, marsh marigold, May blob, meadow bright.

water dragon (noun)	Caltha palustris (noun)
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