Directly related to the verb "serve":
* Servant: A person who serves another, especially in a domestic capacity.
* Service: The action of serving or the state of being served.
* Serviceable: Suitable for use or service.
* Servile: Of or relating to a servant; submissive or obsequious.
Words that use the root "serve" in a more abstract way:
* Disserve: To do a disservice to; to harm.
* Preserve: To keep safe from harm or decay.
* Reserve: To set aside for a particular purpose; to hold back.
* Conserve: To protect from loss or damage.
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