blood flower vs swallowwort

blood flower and swallowwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood flower	Yes	No	No	No
swallowwort	Yes	No	No	No

As nouns, blood flower and swallowwort are synonyms defined as:

blood flower and swallowwort: tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings; a weed throughout the tropics

Other synonyms of blood flower include Asclepias curassavica.

blood flower (noun)	swallowwort (noun)
tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings; a weed throughout the tropics	perennial herb with branched woody stock and bright yellow flowers
	tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings; a weed throughout the tropics