alphabet vs alphabetic character

alphabet and alphabetic character both are nouns.

Word	Noun	Adjective	Verb	Adverb
alphabet	Yes	No	No	No
alphabetic character	Yes	No	No	No

alphabet (noun)	alphabetic character (noun)
the elementary stages of any subject (usually plural)	the conventional characters of the alphabet used to represent speech
a character set that includes letters and is used to write a language