Cub and Young person

Cub noun - A person who is just starting out in a field of activity.

Young person and cub are semantically related In some cases you can use "Young person" instead a noun "Cub".

Young person noun - A young person (especially a young man or boy).

Cub and young person are semantically related in child topic. Sometimes you can use "Cub" instead a noun phrase "Young person", if it concerns topics such as person before the age of maturity.