procaine vs novocaine

procaine and novocaine both are nouns.

Word	Noun	Adjective	Verb	Adverb
procaine	Yes	No	No	No
novocaine	Yes	No	No	No

As nouns, novocaine is a hyponym of procaine; that is, novocaine is a word with a more specific, narrower meaning than procaine:

procaine: a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine
novocaine: procaine administered as a hydrochloride (trade name Novocain)

Other hyponyms of procaine include Novocain, procaine hydrochloride.

procaine (noun)	novocaine (noun)
a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine	procaine administered as a hydrochloride (trade name Novocain)