sitcom vs TV program

sitcom and TV program both are nouns.

Word	Noun	Adjective	Verb	Adverb
sitcom	Yes	No	No	No
TV program	Yes	No	No	No

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

sitcom: a humorous television program based on situations that could arise in everyday life
TV program: a program broadcast by television

Other hypernyms of sitcom include television program, television show, TV show.

sitcom (noun)	TV program (noun)
a humorous television program based on situations that could arise in everyday life	a program broadcast by television
a humorous drama based on situations that might arise in day-to-day life