Work vs Job

Work (неисчисл.) в каком-то смысле более широкое понятие.
Работа вообще (как “дела», занятие)

There’s always a lot of work to be done in the garden.
Shopping and cooking are women’s work.;))

Work is used in a more general way to talk about activities that you do to earn money, either working for a company or for yourself. (Longman)

....WORK может быть исчиляемым (pl. WORKS) = work of art (a book, picture, piece of music)
This is one of XYZ's latest works.
This picture is a work of genuis.