Starting post and Starting block

Starting post noun - A post marking the starting point of a race (especially a horse race).

Starting block and starting post are semantically related In some cases you can use "Starting block" instead a noun phrase "Starting post".

Starting block noun - Block providing bracing for a runner's feet at start of a race.

Starting post and starting block are semantically related in starting point topic. You can use "Starting post" instead a noun phrase "Starting block".