Talwin vs pentazocine

Talwin and pentazocine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Talwin	Yes	No	No	No
pentazocine	Yes	No	No	No

As nouns, Talwin and pentazocine are synonyms defined as:

Talwin and pentazocine: analgesic drug (trade name Talwin) that is less addictive than morphine

Talwin (noun)	pentazocine (noun)
analgesic drug (trade name Talwin) that is less addictive than morphine	analgesic drug (trade name Talwin) that is less addictive than morphine