meperidine hydrochloride vs meperidine

meperidine hydrochloride and meperidine both are nouns.

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

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

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

Other synonyms of meperidine hydrochloride include Demerol.

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