1.in spoken language,we often use"够了".
in written language,we often use"足够".
2.after “足够”,we can add some adjectives
for example,足够多(的)、足够好(的)。
more formal
3.if you are annoyed by something..(when you are arguing with someone,,and you dont want to talk anymore,,)you can say "够了!" with a strong tone
^^