program line vs computer code

program line and computer code both are nouns.

Word	Noun	Adjective	Verb	Adverb
program line	Yes	No	No	No
computer code	Yes	No	No	No

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

program line: (computer science) a line of code written as part of a computer program
computer code: (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions

Other hypernyms of program line include code.

program line (noun)	computer code (noun)
(computer science) a line of code written as part of a computer program	(computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions