pink calla vs calla lily

pink calla and calla lily both are nouns.

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

As nouns, calla lily is a hypernym of pink calla; that is, calla lily is a word with a broader meaning than pink calla:

pink calla: calla having a rose-colored spathe
calla lily: South African plant widely cultivated for its showy pure white spathe and yellow spadix

Other hypernyms of pink calla include arum lily, calla, Zantedeschia aethiopica.

pink calla (noun)	calla lily (noun)
calla having a rose-colored spathe	South African plant widely cultivated for its showy pure white spathe and yellow spadix