rofecoxib vs Vioxx

rofecoxib and Vioxx both are nouns.

Word	Noun	Adjective	Verb	Adverb
rofecoxib	Yes	No	No	No
Vioxx	Yes	No	No	No

As nouns, rofecoxib and Vioxx are synonyms defined as:

rofecoxib and Vioxx: a Cox-2 inhibitor (trade name Vioxx) that relieves pain and inflammation without harming the digestive tract; voluntarily withdrawn from the market in 2004

rofecoxib (noun)	Vioxx (noun)
a Cox-2 inhibitor (trade name Vioxx) that relieves pain and inflammation without harming the digestive tract; voluntarily withdrawn from the market in 2004	a Cox-2 inhibitor (trade name Vioxx) that relieves pain and inflammation without harming the digestive tract; voluntarily withdrawn from the market in 2004