If I lost wallets on hard drive crash, how do I restore with just my wallet words? Restoring data from back up is not working
Since you added the Electrum tag to the question, I'll assume you're using Electrum.
When you first start up Electrum, you get the choice of creating a new seed or creating a wallet from an existing one. At that point you would select to enter your existing seed words, and it should recover your wallet.