Richard Clarke Cabot suggests in
Analogy★★★★What Men Live By that there are three kinds of labor. One is toil that is tedious and tiresome without any hope of reward; this is drudgery. Another is activity that is unpleasant and tedious but carries with it the hope of reward; this is work. Then there is the kind of activity that is so enjoyable that one is eager to do it regardless of the reward or compensations; this is play.
The point
Richard Clarke Cabot categorizes labor into drudgery (tedious without reward), work (tedious with hope of reward), and play (enjoyable regardless of reward).
