ROM vs read-only storage

ROM and read-only storage both are nouns.

Word	Noun	Adjective	Verb	Adverb
ROM	Yes	No	No	No
read-only storage	Yes	No	No	No

As nouns, ROM and read-only storage are synonyms defined as:

ROM and read-only storage: (computer science) memory whose contents can be accessed and read but cannot be changed

Other synonyms of ROM include fixed storage, read-only memory.

ROM (noun)	read-only storage (noun)
(computer science) memory whose contents can be accessed and read but cannot be changed	(computer science) memory whose contents can be accessed and read but cannot be changed