suite vs apartment

suite and apartment both are nouns.

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

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

suite: apartment consisting of a series of connected rooms used as a living unit (as in a hotel)
apartment: a suite of rooms usually on one floor of an apartment house

Other hypernyms of suite include flat.

suite (noun)	apartment (noun)
apartment consisting of a series of connected rooms used as a living unit (as in a hotel)	a suite of rooms usually on one floor of an apartment house
a musical composition of several movements only loosely connected
the group following and attending to some important person
a matching set of furniture