sitcom vs comedy

sitcom and comedy both are nouns.

Word	Noun	Adjective	Verb	Adverb
sitcom	Yes	No	No	No
comedy	Yes	No	No	No

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

sitcom: a humorous drama based on situations that might arise in day-to-day life
comedy: light and humorous drama with a happy ending

sitcom (noun)	comedy (noun)
a humorous television program based on situations that could arise in everyday life	light and humorous drama with a happy ending
a humorous drama based on situations that might arise in day-to-day life	a comic incident or series of incidents