* Laboratory: A room or building equipped for scientific research or experiments.
* Laborer: A person who does manual work, especially unskilled work.
* Labile: Easily changed or unstable.
* Laboring: Working hard or strenuously.
* Label: A small piece of paper, cloth, etc., attached to an object to identify it.
* Labrador: A breed of large, strong dog.
* Laborious: Requiring much effort or hard work.
* Laburnum: A small tree with yellow, drooping flower clusters.
* Labial: Relating to the lips.
* Labyrinth: A complex network of winding passages or a maze.
* Labialization: The modification of a sound by rounding the lips.
These words all stem from the Latin word "labor," meaning "work" or "toil."