Hebrew alphabet vs alphabet

Hebrew alphabet and alphabet both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hebrew alphabet	Yes	No	No	No
alphabet	Yes	No	No	No

As nouns, alphabet is a hypernym of Hebrew alphabet; that is, alphabet is a word with a broader meaning than Hebrew alphabet:

Hebrew alphabet: a Semitic alphabet used since the 5th century BC for writing the Hebrew language (and later for writing Yiddish and Ladino)
alphabet: a character set that includes letters and is used to write a language

Other hypernyms of Hebrew alphabet include ABC's, ABC, ABCs, unicameral script.

Hebrew alphabet (noun)	alphabet (noun)
a Semitic alphabet used since the 5th century BC for writing the Hebrew language (and later for writing Yiddish and Ladino)	the elementary stages of any subject (usually plural)
	a character set that includes letters and is used to write a language