Direct Derivatives:
* Handy: Convenient, useful, skillful with one's hands.
* Handful: A small amount, a group that can be held in one hand.
* Handmade: Made by hand, not machine-made.
* Handwritten: Written by hand, not typed.
* Handicap: A disability that limits a person's ability to do something.
* Handbill: A small printed announcement or advertisement.
* Handshake: A gesture of greeting or agreement, involving shaking someone's hand.
* Handkerchief: A small piece of fabric used for wiping the nose or face.
Words with "hand" as a combining form:
* Handstand: A gymnastic exercise in which a person stands on their hands.
* Handwritten: Written by hand, not typed.
* Handloom: A loom operated by hand.
* Handbook: A book containing practical information about a particular subject.
* Handcuffs: Metal restraints for the wrists used to arrest someone.
* Handsome: Attractive or good-looking (originally referring to a man with a strong hand).
* Handrail: A rail fixed along a staircase or other structure for support.
* Handbag: A small bag carried by women.
* Handcart: A small cart pulled by hand.
Less direct derivatives:
* Manhandle: To handle roughly, to physically force someone.
* Right-hand man: A trusted assistant.
* Secondhand: Used or owned by someone else before.
* Lefthanded: Using the left hand as the dominant one.
* Offhand: Without much thought or preparation.
* On hand: Available, present.
This is just a sample, there are many more words that can be traced back to the root "hand"!