You should take a look at this:

https://www.uptoplay.net/wordiest-online-game/com.concretero...

Very similar in spirit, but IMHO a lot more enjoyable than your version. It's untimed which takes the pressure off, but still a challenge because there are multiple potentially correct answers.

The on-line version doesn't seem to be working, and I don't have an android device so I can't tell if the app is still working either. But I ran this on my nexus 7 for years until it died. It was one of my favorite on-line games. I would happily pay someone to port it to ios.