Greenhorn and New kid on block

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

New kid on block and greenhorn are semantically related In some cases you can use "New kid on block" instead a noun "Greenhorn".

Greenhorn and new kid on block are semantically related in beginner topic. Sometimes you can use "Greenhorn" instead a noun phrase "New kid on block", if it concerns topics such as novice, newcomer, person just learning something, person unskilled in something.