Tagamet vs alkaliser

Tagamet and alkaliser both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tagamet	Yes	No	No	No
alkaliser	Yes	No	No	No

As nouns, alkaliser is a hypernym of Tagamet; that is, alkaliser is a word with a broader meaning than Tagamet:

Tagamet: a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid
alkaliser: an agent that counteracts or neutralizes acidity (especially in the stomach)

Other hypernyms of Tagamet include histamine blocker, alkalizer, antacid, antiacid, gastric antacid.

Tagamet (noun)	alkaliser (noun)
a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid	an agent that counteracts or neutralizes acidity (especially in the stomach)