Rolaids vs antacid

Rolaids and antacid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rolaids	Yes	No	No	No
antacid	Yes	Yes	No	No

As nouns, antacid is a hypernym of Rolaids; that is, antacid is a word with a broader meaning than Rolaids:

Rolaids: an antacid
antacid: an agent that counteracts or neutralizes acidity (especially in the stomach)

Other hypernyms of Rolaids include alkaliser, alkalizer, antiacid, gastric antacid.

Rolaids (noun)	antacid (noun)
an antacid	an agent that counteracts or neutralizes acidity (especially in the stomach)

Rolaids (adjective)	antacid (adjective)
	acting to neutralize acid (especially in the stomach)