Indian paintbrush vs orange milkweed

Indian paintbrush and orange milkweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Indian paintbrush	Yes	No	No	No
orange milkweed	Yes	No	No	No

As nouns, Indian paintbrush and orange milkweed are synonyms defined as:

Indian paintbrush and orange milkweed: erect perennial of eastern and southern United States having showy orange flowers

Other synonyms of Indian paintbrush include Asclepias tuberosa, butterfly weed, chigger flower, chiggerflower, pleurisy root, tuber root.

Indian paintbrush (noun)	orange milkweed (noun)
any of various plants of the genus Castilleja having dense spikes of hooded flowers with brightly colored bracts	erect perennial of eastern and southern United States having showy orange flowers
erect perennial of eastern and southern United States having showy orange flowers