General:
* Unit: A fundamental, independent component.
* Chamber: A small, enclosed space.
* Compartment: A distinct, separated section.
* Division: A distinct part or section.
* Element: A basic, irreducible part.
* Component: A constituent part of a larger system.
Biological:
* Cytocyte: A biological cell.
* Somatic cell: A non-reproductive cell.
* Germ cell: A reproductive cell.
* Neuron: A nerve cell.
* Epithelial cell: A cell that lines surfaces.
* Muscle cell: A cell that contracts.
* Blood cell: A cell found in blood.
Other:
* Prison cell: A small, enclosed space for confinement.
* Battery cell: An individual unit within a battery.
* Solar cell: A device that converts sunlight into electricity.
Figurative:
* Hive: A busy, organized group of people.
* Nucleus: The central core or heart of something.
To choose the best synonym, consider the specific meaning and context of the word "cell" in your sentence.