Still, I'd advice using it because 'entity' is the top holonym in WordNet. I'd also argue if everything in a system is called an entity all meaning is lost and

Still, I'd advice using it because 'entity' is the top holonym in WordNet. I'd also argue if everything in a system is called an entity all meaning is lost and you should pick something from the lower levels of WordNet like 'thing' or 'stuff'. Never said WordNet helps to sell your product, that's an entirely different task.