Budding is a type of asexual reproduction in which a new individual organism is developed from a small projection or outgrowth of the parent individual called buds. The buds remain attached to the parent to derive the nutrients till it gets matured. Once matured, it detaches from the parent, fall on to the substratum and develops into a new organism. E.g. Hydra .

Bud is an outgrowth of a cell due to cell division at one particular site. It can give rise to a new individual by the process of budding. The bud remains attached to the parent to derive the nutrients till it gets matured. Once matured, it detaches from the parent, falls onto the substratum, and develops into a new organism.

Regeneration is the process of getting back a full organism from its body parts or regenerating the lost parts due to injury etc. E.g. Planaria . It is a type of asexual reproduction. If the body of Planaria is somehow cut into a number of pieces, then each body piece can regenerate into a complete organism by regenerating all the missing parts.