General Terms:
* Apprentice: This is the most common term for someone who is learning a trade under the supervision of a skilled worker.
* Trainee: This term is broader and can apply to someone learning any type of skill, not just a trade.
* Student: This term is typically used for someone learning a trade in a formal educational setting, such as a vocational school or apprenticeship program.
Specific Terms:
* Journeyman: This term refers to a skilled worker who has completed their apprenticeship and is now working independently.
* Tradesperson: This term is used for someone who works in a trade, regardless of their level of experience.
Other options:
* Learner: This is a general term for someone who is acquiring new knowledge or skills.
* Protégé: This term is used for someone who is being mentored by a more experienced person.
The best word to use will depend on the specific situation and the level of the person's training.