I am thinking about how we define things and how it affects cognition. Also, definitions are dependent upon the given situation (context) and must be tied down to practical matters. And what is the purpose of defining things and gaining clarity of the way things are unless it all can be placed into a system for living a good life (and has some therapeutic benefit)?
The word "pleasure" can be a catch-all word but there is too much ambiguity in it.
We generally (at first glance) think that the word "pleasure" is describing something sensual - food, drink, beautiful sights, smells, and touch (a warm bath, back massages, or sex).
There is also a category of "the joys of life" - and many people would consider such moments as the birth of their children, or gatherings/celebrations (or reunions) with family and friends, as being in this category.
Then there are "the simple joys of life" - rituals of going for a morning walk, reading a book, playing with one's children or pets, etc.
And there are "enjoyments" - which are mental pleasures (instead of saying "mental pleasure" we can say "enjoyments") and it is when we consider that something was more enjoyable than painful that we say: "I enjoyed _________(xyz)."
If we think of a life that has more pleasures than pains (physical) and more enjoyments then agitations (mental), we would likely define it as a pleasant life - and that is what we are aiming for. And we could say that a pleasant life is a "happy" life. (Happy and happiness also need more words to define them in whatever context they arise in).