Darvon vs propoxyphene

Darvon and propoxyphene both are nouns.

Word	Noun	Adjective	Verb	Adverb
Darvon	Yes	No	No	No
propoxyphene	Yes	No	No	No

As nouns, Darvon and propoxyphene are synonyms defined as:

Darvon and propoxyphene: a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive

Other synonyms of Darvon include propoxyphene hydrochloride.

Darvon (noun)	propoxyphene (noun)
a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive	a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive