Urex vs methenamine

Urex and methenamine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Urex	Yes	No	No	No
methenamine	Yes	No	No	No

As nouns, Urex and methenamine are synonyms defined as:

Urex and methenamine: antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections

Other synonyms of Urex include Mandelamine.

Urex (noun)	methenamine (noun)
antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections	antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections