ECC vs error correction code

ECC and error correction code both are nouns.

Word	Noun	Adjective	Verb	Adverb
ECC	Yes	No	No	No
error correction code	Yes	No	No	No

As nouns, ECC and error correction code are synonyms defined as:

ECC and error correction code: (telecommunication) a coding system that incorporates extra parity bits in order to detect errors

ECC (noun)	error correction code (noun)
(telecommunication) a coding system that incorporates extra parity bits in order to detect errors	(telecommunication) a coding system that incorporates extra parity bits in order to detect errors