What is the difference between phagocytosis and endocytosis?

Endocytosis is defined as the process of engulfing molecules. It has four subcategories, one of which is phagocytosis. So phagocytosis is a type of endocytosis.

Phagocytosis is the process of engulfing solid particles with a particular size (about 0.75 nanometers in diameter). Examples of these are: dust particles, cell debris, and apoptotic cells.

Phagocytosis involves the engulfing of solid particles which only can be done through oxygen or non-oxygen dependent processes while endocytosis involves intake of either solid or liquid particles.