Blacklist Options?

My site receives a lot of spam comments, and a lot of them use similar language, so I was hoping to create a blacklist where anything that had already been flagged as spam gets deleted if it contains a word or phrase that I put on the blacklist.

I like to go through the spam to ensure that someone real did not write a comment that accidentally got caught in the filter. However, it does take up quite a bit of time that has now become more of a premium to me than before.

When I check my site settings, I am not seeing any setup options for such a feature. Is there any solution you can recommend? It has been about a decade that I have been struggling with this, so I finally decided to check with the experts. 🙂