Tums vs antiacid

Tums and antiacid both are nouns.

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

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

Tums: an antacid with active ingredient bismuth subsalicylate
antiacid: an agent that counteracts or neutralizes acidity (especially in the stomach)

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

Tums (noun)	antiacid (noun)
an antacid with active ingredient bismuth subsalicylate	an agent that counteracts or neutralizes acidity (especially in the stomach)