malaria parasite vs Plasmodium vivax

malaria parasite and Plasmodium vivax both are nouns.

Word	Noun	Adjective	Verb	Adverb
malaria parasite	Yes	No	No	No
Plasmodium vivax	Yes	No	No	No

As nouns, malaria parasite and Plasmodium vivax are synonyms defined as:

malaria parasite and Plasmodium vivax: parasitic protozoan of the genus Plasmodium that causes malaria in humans

Other synonyms of malaria parasite include plasmodium.

malaria parasite (noun)	Plasmodium vivax (noun)
parasitic protozoan of the genus Plasmodium that causes malaria in humans	parasitic protozoan of the genus Plasmodium that causes malaria in humans