Prilosec vs antiacid

Prilosec and antiacid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prilosec	Yes	No	No	No
antiacid	Yes	No	No	No

As nouns, antiacid is a hypernym of Prilosec; that is, antiacid is a word with a broader meaning than Prilosec:

Prilosec: antacid (trade name Prilosec) that suppresses acid secretion in the stomach
antiacid: an agent that counteracts or neutralizes acidity (especially in the stomach)

Other hypernyms of Prilosec include alkaliser, alkalizer, antacid, gastric antacid.

Prilosec (noun)	antiacid (noun)
antacid (trade name Prilosec) that suppresses acid secretion in the stomach	an agent that counteracts or neutralizes acidity (especially in the stomach)