It is very common to see people using the words "Garbage" and "Trash" interchangeably simply because both give a meaning of different kinds of materials that are meant to be discarded because they are no longer useful. However, the word "garbage" is used to refer to disposable or useless materials, most especially food wastes of any kind and other materials from the kitchen and bathroom.
Food containers, clothing, paper materials, and other organic materials are examples of garbage. Trash, on the other hand, refers to disposable or useless materials from anywhere aside from the bathroom and kitchen. Grass clippings, old furniture, junk, twigs, leaves, are under this category.
Waste materials that are classified as garbage are usually picked up by agencies like the waste control department, while trash is picked up by contractors. However, there are some waste materials that will not be picked up by contractors and waste control departments, but they will need to be disposed of personally.