Brain-stem and Neural structure

Brain-stem noun - The part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus.

Neural structure and brain-stem are semantically related. In some cases you can use "Neural structure" instead a noun phrase "Brain-stem".

Neural structure noun - A structure that is part of the nervous system.

Brain-stem and neural structure are semantically related. Sometimes you can replace phrase "Brain-stem" with "Neural structure", this phrases are similar.