CAD vs computer software

CAD and computer software both are nouns.

Word	Noun	Adjective	Verb	Adverb
CAD	Yes	No	No	No
computer software	Yes	No	No	No

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

CAD: software used in art and architecture and engineering and manufacturing to assist in precision drawing
computer software: (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory

Other hypernyms of CAD include package, software, software package, software program, software system.

CAD (noun)	computer software (noun)
software used in art and architecture and engineering and manufacturing to assist in precision drawing	(computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory