Novice and Undergrad

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

Undergrad and novice are semantically related In some cases you can use "Undergrad" instead a noun "Novice".

Undergrad noun - A university student who has not yet received a first degree.

Novice and undergrad are semantically related in first-year student topic. You can use "Novice" instead a noun "Undergrad", if it concerns topics such as person actively learning.