Is there any difference between "EMERGENCY LANDING" and "FORCED LANDING"?
Not all forced landings are emergencies, and not all emergencies are forced landings! (See below)
In general, the term &quot;Emergency Landing&quot; is a superset which covers a bunch of different scenarios where a landing is not quite to plan. Such as

Forced landing due to mechanical failure. Note that a forced landing can absolutely be at an airfield. It can also be in a literal field.
Precautionary landing, such as where continued flight is possible but inadvisable
Ditching in a body of water
Belly landing due to inoperable landing gear

A forced landing can also be one where the pilot is forced to land due to military interception, which is not always an emergency.
This is all covered in great detail here

The FAA also publish some useful information on this subject which repeats much of the above information, reproduced below for clarity

Types of Emergency Landings
The different types of emergency landings are defined as
follows:
• Forced landing—an immediate landing, on or off an
airport, necessitated by the inability to continue further
flight. A typical example of which is an airplane forced
down by engine failure.
• Precautionary landing—a premeditated landing, on
or off an airport, when further flight is possible but
inadvisable. Examples of conditions that may call for
a precautionary landing include deteriorating weather,
being lost, fuel shortage, and gradually developing
engine trouble.
• Ditching—a forced or precautionary landing on water