C program vs computer program

C program and computer program both are nouns.

Word	Noun	Adjective	Verb	Adverb
C program	Yes	No	No	No
computer program	Yes	No	No	No

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

C program: a program written in C
computer program: (computer science) a sequence of instructions that a computer can interpret and execute

Other hypernyms of C program include computer programme, program, programme.

C program (noun)	computer program (noun)
a program written in C	(computer science) a sequence of instructions that a computer can interpret and execute