Costa and Os

Costa noun - Any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates).

Os and costa are semantically related. In some cases you can use "Os" instead a noun "Costa".

Nearby Word: costal

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

Costa and os are semantically related. Sometimes you can replace term "Costa" with "Os", this nouns are similar.