EPROM vs ROM

EPROM and ROM both are nouns.

Word	Noun	Adjective	Verb	Adverb
EPROM	Yes	No	No	No
ROM	Yes	No	No	No

As nouns, ROM is a hypernym of EPROM; that is, ROM is a word with a broader meaning than EPROM:

EPROM: (computer science) a read-only memory chip that can be erased by ultraviolet light and programmed again with new data
ROM: (computer science) memory whose contents can be accessed and read but cannot be changed

Other hypernyms of EPROM include fixed storage, read-only memory, read-only storage.

EPROM (noun)	ROM (noun)
(computer science) a read-only memory chip that can be erased by ultraviolet light and programmed again with new data	(computer science) memory whose contents can be accessed and read but cannot be changed