Regularity is a related term of coolness.
In uncountable|lang=en terms the difference between regularity and coolness
is that
regularity is (uncountable) the condition or quality of being regular; as, regularity of outline while
coolness is (uncountable) the state of being cool, as in chilly.
In countable|lang=en terms the difference between regularity and coolness
is that
regularity is (countable) a particular regular occurrence while
coolness is (countable) the result or product of being cool, as in chilly.
As nouns the difference between regularity and coolness
is that
regularity is (uncountable) the condition or quality of being regular; as, regularity of outline while
coolness is (uncountable) the state of being cool, as in chilly.