water arum vs wild calla

water arum and wild calla both are nouns.

Word	Noun	Adjective	Verb	Adverb
water arum	Yes	No	No	No
wild calla	Yes	No	No	No

As nouns, water arum and wild calla are synonyms defined as:

water arum and wild calla: plant of wetlands and bogs of temperate regions having small greenish flowers partly enclosed in a white spathe and red berries

Other synonyms of water arum include Calla palustris.

water arum (noun)	wild calla (noun)
plant of wetlands and bogs of temperate regions having small greenish flowers partly enclosed in a white spathe and red berries	plant of wetlands and bogs of temperate regions having small greenish flowers partly enclosed in a white spathe and red berries