Moppet and Prepubescent

Moppet noun - A young person who is between infancy and adulthood.

Prepubescent and moppet are semantically related. In some cases you can replace term "Prepubescent" with "Moppet", this nouns are similar.

Prepubescent adjective - (especially of human beings) at the age immediately before puberty; often marked by accelerated growth.

Moppet and prepubescent are semantically related. You can use "Moppet" instead a noun "Prepubescent".