methadon vs synthetic heroin

methadon and synthetic heroin both are nouns.

Word	Noun	Adjective	Verb	Adverb
methadon	Yes	No	No	No
synthetic heroin	Yes	No	No	No

As nouns, methadon and synthetic heroin are synonyms defined as:

methadon and synthetic heroin: synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction

Other synonyms of methadon include dolophine hydrochloride, fixer, methadone, methadone hydrochloride.

methadon (noun)	synthetic heroin (noun)
synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction	synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction