calla lily vs arum lily

calla lily and arum lily both are nouns.

Word	Noun	Adjective	Verb	Adverb
calla lily	Yes	No	No	No
arum lily	Yes	No	No	No

As nouns, calla lily and arum lily are synonyms defined as:

calla lily and arum lily: South African plant widely cultivated for its showy pure white spathe and yellow spadix

Other synonyms of calla lily include calla, Zantedeschia aethiopica.

calla lily (noun)	arum lily (noun)
South African plant widely cultivated for its showy pure white spathe and yellow spadix	South African plant widely cultivated for its showy pure white spathe and yellow spadix