ranitidine vs alkaliser

ranitidine and alkaliser both are nouns.

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

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

ranitidine: a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux
alkaliser: an agent that counteracts or neutralizes acidity (especially in the stomach)

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

ranitidine (noun)	alkaliser (noun)
a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux	an agent that counteracts or neutralizes acidity (especially in the stomach)