To unfold on what TheFlyingCamera said:
There are manufacturer-own types and designations as (type) 120, 110, Rapid, SL, Super-8 and many more. Some of them became industry standards.
These all refer to ready to use prepared film. Typically in some sort of cassette (or at least on some covered spool as in type 120).
See my use of the word type.
The other designations refers to the actual or nominal width of film. As 35mm, 70mm, 9mm film etc.
And these often can be used in a variety of cameras.
Sometimes though these designations are carelessly mixed up as 35mm instead of type 135.
Even to a degree that they meanwhile became standard as 35mm camera, although actually a type 135 camera is meant.