computer database vs database

computer database and database both are nouns.

Word	Noun	Adjective	Verb	Adverb
computer database	Yes	No	No	No
database	Yes	No	No	No

As nouns, database is a hypernym of computer database; that is, database is a word with a broader meaning than computer database:

computer database: (computer science) a database that can be accessed by computers
database: an organized body of related information

computer database (noun)	database (noun)
(computer science) a database that can be accessed by computers	an organized body of related information