water crowfoot vs water buttercup

water crowfoot and water buttercup both are nouns.

Word	Noun	Adjective	Verb	Adverb
water crowfoot	Yes	No	No	No
water buttercup	Yes	No	No	No

As nouns, water crowfoot and water buttercup are synonyms defined as:

water crowfoot and water buttercup: plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America

Other synonyms of water crowfoot include Ranunculus aquatilis.

water crowfoot (noun)	water buttercup (noun)
plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America	plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America