As nouns the difference between monad and comonad
is that monad
is an ultimate atom, or simple, unextended point; something ultimate and indivisible while comonad
is (mathematics|category theory) a monad of the opposite category.
Other Comparisons: What's the difference?
An ultimate atom, or simple, unextended point; something ultimate and indivisible.
(mathematics, computing) A monoid in the category of endofunctors.
A single individual (such as a pollen grain) that is free from others, not united in a group.
(mathematics, category theory) A monad of the opposite category
* on Wikipedia