RNA polymerase vs polymerase

RNA polymerase and polymerase both are nouns.

Word	Noun	Adjective	Verb	Adverb
RNA polymerase	Yes	No	No	No
polymerase	Yes	No	No	No

As nouns, polymerase is a hypernym of RNA polymerase; that is, polymerase is a word with a broader meaning than RNA polymerase:

RNA polymerase: the enzyme that copies DNA into RNA
polymerase: an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA

RNA polymerase (noun)	polymerase (noun)
the enzyme that copies DNA into RNA	an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA