benzylpenicillin vs penicillin G

benzylpenicillin and penicillin G both are nouns.

Word	Noun	Adjective	Verb	Adverb
benzylpenicillin	Yes	No	No	No
penicillin G	Yes	No	No	No

As nouns, benzylpenicillin and penicillin G are synonyms defined as:

benzylpenicillin and penicillin G: the penicillin that constitutes the principal component of many commercial antibiotics

benzylpenicillin (noun)	penicillin G (noun)
the penicillin that constitutes the principal component of many commercial antibiotics	the penicillin that constitutes the principal component of many commercial antibiotics