Life form and Physical structure

Life form noun - The characteristic bodily form of a mature organism.

Physical structure and life form are semantically related. In some cases you can use "Physical structure" instead a noun phrase "Life form".

Physical structure noun - The entire structure of an organism (an animal, plant, or human being).

Life form and physical structure are semantically related. Sometimes you can replace phrase "Life form" with "Physical structure", this phrases are similar.