Ninja and Whizz-kid

Ninja noun - A member of the ninja who were trained in martial arts and hired for espionage or sabotage or assassinations; a person skilled in ninjutsu.

Whizz-kid and ninja are semantically related. In some cases you can use "Whizz-kid" instead a noun "Ninja".

Whizz-kid noun - Someone whose career progresses rapidly.

Ninja and whizz-kid are semantically related. You can use "Ninja" instead a noun phrase "Whizz-kid".