Jumping-off point and Starting block

Jumping-off point noun - A beginning from which an enterprise is launched.

Starting block and jumping-off point are semantically related In some cases you can use "Starting block" instead a noun phrase "Jumping-off point".

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

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