sitcom vs television program

sitcom and television program both are nouns.

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

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

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

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

sitcom (noun)	television 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