Os and Sacrum

Os noun - A hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known.

Sacrum and os are semantically related. In some cases you can replace term "Sacrum" with "Os", this nouns are similar.

Sacrum noun - Wedge-shaped bone consisting of five fused vertebrae forming the posterior part of the pelvis; its base connects with the lowest lumbar vertebra and its tip with the coccyx.

Os and sacrum are semantically related. Sometimes you can use "Os" instead a noun "Sacrum".

Nearby Word: sacral