Pneumovax vs pneumococcal vaccine

Pneumovax and pneumococcal vaccine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pneumovax	Yes	No	No	No
pneumococcal vaccine	Yes	No	No	No

As nouns, Pneumovax and pneumococcal vaccine are synonyms defined as:

Pneumovax and pneumococcal vaccine: vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus

Pneumovax (noun)	pneumococcal vaccine (noun)
vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus	vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus