sodium thiopental vs purple heart

sodium thiopental and purple heart both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium thiopental	Yes	No	No	No
purple heart	Yes	No	No	No

As nouns, sodium thiopental and purple heart are synonyms defined as:

sodium thiopental and purple heart: a long-acting barbiturate used as a sedative

Other synonyms of sodium thiopental include Luminal, phenobarbital, phenobarbitone.

sodium thiopental (noun)	purple heart (noun)
a long-acting barbiturate used as a sedative	a long-acting barbiturate used as a sedative