Armenian alphabet vs ABC's

Armenian alphabet and ABC's both are nouns.

Word	Noun	Adjective	Verb	Adverb
Armenian alphabet	Yes	No	No	No
ABC's	Yes	No	No	No

As nouns, ABC's is a hypernym of Armenian alphabet; that is, ABC's is a word with a broader meaning than Armenian alphabet:

Armenian alphabet: a writing system having an alphabet of 38 letters in which the Armenian language is written
ABC's: a character set that includes letters and is used to write a language

Other hypernyms of Armenian alphabet include ABC, ABCs, alphabet.

Armenian alphabet (noun)	ABC's (noun)
a writing system having an alphabet of 38 letters in which the Armenian language is written	a character set that includes letters and is used to write a language