plasmid DNA vs plasmid

plasmid DNA and plasmid both are nouns.

Word	Noun	Adjective	Verb	Adverb
plasmid DNA	Yes	No	No	No
plasmid	Yes	No	No	No

As nouns, plasmid DNA and plasmid are synonyms defined as:

plasmid DNA and plasmid: a small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication

plasmid DNA (noun)	plasmid (noun)
a small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication	a small cellular inclusion consisting of a ring of DNA that is not in a chromosome but is capable of autonomous replication