antiacid vs alkaliser

antiacid and alkaliser both are nouns.

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

As nouns, antiacid and alkaliser are synonyms defined as:

antiacid and alkaliser: an agent that counteracts or neutralizes acidity (especially in the stomach)

Other synonyms of antiacid include alkalizer, antacid, gastric antacid.

antiacid (noun)	alkaliser (noun)
an agent that counteracts or neutralizes acidity (especially in the stomach)	an agent that counteracts or neutralizes acidity (especially in the stomach)