Annoyance is a related term of adversity.
In countable|lang=en terms the difference between annoyance and adversity
is that
annoyance is (countable) an act or instance of annoying while
adversity is (countable) an event that is adverse; calamity.
In uncountable|lang=en terms the difference between annoyance and adversity
is that
annoyance is (uncountable) the psychological state of being annoyed or irritated while
adversity is (uncountable) the state of adverse conditions; state of misfortune or calamity.
As nouns the difference between annoyance and adversity
is that
annoyance is (countable) that which annoys while
adversity is (uncountable) the state of adverse conditions; state of misfortune or calamity.