The term 'LACKING SHAPE' can be summed up as 'FORMLESS, ' which is an 8-letter word. This term is used to describe something that does not have a distinct shape or form, such as a blob of paint or a cloud of smoke. It can also be used to describe something that is abstract or intangible, such as a feeling or emotion. In general, it is used to describe something that is not easily defined by its physical characteristics.