These are two different terms, though some dictionaries may tell you they are the same.  Organelles, in biology, are the microscopic sub-cellular structures seen inside the cells, e.g., mitochondria, chloroplasts, ribosomes, etc.  They perform certain functions inside the cell.  Organoids, on the other hand, are multicellular 3-D structures made from cultured stem cells on scaffolds.  They serve as models for specific organ cells in tissue-like structures.  They are used in biological and pharmaceutical studies.  Their technology is in continuous and rapid development.