swallowwort vs blood flower

swallowwort and blood flower both are nouns.

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

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

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

Other synonyms of swallowwort include Asclepias curassavica.

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