TV program vs sitcom

TV program and sitcom both are nouns.

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

As nouns, sitcom is a hyponym of TV program; that is, sitcom is a word with a more specific, narrower meaning than TV program:

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

Other hyponyms of TV program include colorcast, colourcast, pilot, pilot film, pilot program, situation comedy, special.

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