alphabetic character vs alphabet

alphabetic character and alphabet both are nouns.

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

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