What is another word that describes a cell structure?

There isn't a single perfect synonym for "cell structure", as it can refer to a few different things. Here are some options depending on the specific context:

For the overall organization of a cell:

* Cellular architecture

* Cellular organization

* Cell morphology (describes the shape and form)

* Cytoskeleton (refers to the internal framework)

* Organelle arrangement

For specific parts of a cell:

* Organelle (for a specific functional unit)

* Component (for a part of the cell)

* Structure (general term, but can be specific)

More general terms:

* Anatomy (for the structure of living things)

* Microanatomy (for the detailed structure of small things)

The best alternative will depend on the specific context of your writing.