Frontal bone and Membrane bone

Frontal bone noun - The large cranial bone forming the front part of the cranium: includes the upper part of the orbits.

Membrane bone and frontal bone are semantically related. In some cases you can use "Membrane bone" instead a noun phrase "Frontal bone".

Membrane bone noun - Any bone that develops within membranous tissue without previous cartilage formation; e.g. the clavicle and bones of the skull.

Frontal bone and membrane bone are semantically related. Sometimes you can replace phrase "Frontal bone" with "Membrane bone", this phrases are similar.