acid vs acidify

acid is a noun but acidify is not a noun.

Word	Noun	Adjective	Verb	Adverb
acid	Yes	Yes	No	No
acidify	No	No	Yes	No

acid (noun)	acidify (noun)
street name for lysergic acid diethylamide
any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

acid (adjective)	acidify (adjective)
having the characteristics of an acid
being sour to the taste
harsh or corrosive in tone

acid (verb)	acidify (verb)
	turn acidic
	make sour or more sour