meperidine hydrochloride vs Demerol

meperidine hydrochloride and Demerol both are nouns.

Word	Noun	Adjective	Verb	Adverb
meperidine hydrochloride	Yes	No	No	No
Demerol	Yes	No	No	No

As nouns, meperidine hydrochloride and Demerol are synonyms defined as:

meperidine hydrochloride and Demerol: a synthetic narcotic drug (trade name Demerol) used to treat pain

Other synonyms of meperidine hydrochloride include meperidine.

meperidine hydrochloride (noun)	Demerol (noun)
a synthetic narcotic drug (trade name Demerol) used to treat pain	a synthetic narcotic drug (trade name Demerol) used to treat pain