In science we need to be clear and use terminologies as accurate and as specific as possible. When we look at literature, however, we see the words you mentioned are used interchangeably. For instance:
Polymer coating/encapsulation of nanoparticles using - New Jersey ...
https://web.njit.edu/~dave/SCF-Coating-Nano-1.pdf
by Y Wang - 2003 - Cited by 147 - Related articles
Coating or encapsulation of nanoparticles is a major challenge due to the extremely small size, high surface .... ica nanoparticles of different sizes (Table 1) from.
However, lipid encapsulation is a generic term and differences exist between ... while a true encapsulation contains a layered coating of fatty acids applied ...