Ah, I see what you're asking. If someone is verifying transactions, they'd be running a node - so we'd call them a "node operator" or "node runner".

If they were also using their computer power to solve the complex mathematical puzzles that add new blocks to the Bitcoin blockchain (which includes verifying transactions), then we could also call them a "miner".

A "Bitcoin user" or "holder" might not necessarily run a node or mine - these terms usually just mean someone who owns some BTC.

Remember though, labels aren't everything! Many folks wear multiple hats in the Bitcoin world. You could be a miner, node runner and holder all at once if you wanted to!