CD vs certificate of deposit

CD and certificate of deposit both are nouns.

Word	Noun	Adjective	Verb	Adverb
CD	Yes	No	No	No
certificate of deposit	Yes	No	No	No

As nouns, CD and certificate of deposit are synonyms defined as:

CD and certificate of deposit: a debt instrument issued by a bank; usually pays interest

CD (noun)	certificate of deposit (noun)
a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser	a debt instrument issued by a bank; usually pays interest
a debt instrument issued by a bank; usually pays interest