"A Monad is to 'bind' as a Comonad is to 'cojoin'"

"A Monad is to 'return' as a Comonad is to 'extract'"

"A Monad is to 'map' as a Comonad is to 'coextend'"

"A Monad is to 'flatMap' as a Comonad is to 'extend'"