alphabet vs plural form

alphabet and plural form both are nouns.

Word	Noun	Adjective	Verb	Adverb
alphabet	Yes	No	No	No
plural form	Yes	No	No	No

alphabet (noun)	plural form (noun)
the elementary stages of any subject (usually plural)	the form of a word that is used to denote more than one
a character set that includes letters and is used to write a language