Block and Metal bar

Block noun - A number of things considered as a unit.

Metal bar and block are semantically related. In some cases you can replace phrase "Metal bar" with "Block", this terms are similar.

Nearby Words: blocked, blockade, blockage, blockhead, blocking

Metal bar noun - Metal that is cast in the shape of a block for convenient handling.

Block and metal bar are semantically related. You can use "Block" instead a noun phrase "Metal bar".