studio vs apartment

studio and apartment both are nouns.

Word	Noun	Adjective	Verb	Adverb
studio	Yes	No	No	No
apartment	Yes	No	No	No

As nouns, apartment is a hypernym of studio; that is, apartment is a word with a broader meaning than studio:

Other hypernyms of studio include flat.

studio (noun)	apartment (noun)
workplace for the teaching or practice of an art	a suite of rooms usually on one floor of an apartment house
an apartment with a living space and a bathroom and a small kitchen
workplace consisting of a room or building where movies or television shows or radio programs are produced and recorded