Flagyl vs metronidazole

Flagyl and metronidazole both are nouns.

Word	Noun	Adjective	Verb	Adverb
Flagyl	Yes	No	No	No
metronidazole	Yes	No	No	No

As nouns, Flagyl and metronidazole are synonyms defined as:

Flagyl and metronidazole: antiprotozoal medication (trade name Flagyl) used to treat trichomoniasis and giardiasis

Flagyl (noun)	metronidazole (noun)
antiprotozoal medication (trade name Flagyl) used to treat trichomoniasis and giardiasis	antiprotozoal medication (trade name Flagyl) used to treat trichomoniasis and giardiasis