Your game reminds me of this one: https://store.steampowered.com/app/3586660/Word_Play/

You can play a demo version for free. Think if you want to make it playable for longer you need some catch to make it more interesting. 

- The game above I won't play very frequently either... but maybe it is because I'm not a native english speaker. (But maybe people have liked it no matter what)

Me personally i would try to go for a direction where I add some variation to the "ground task"... maybe somtimes instead of comming up with words... "i need to find the hidden word ... to complete a sentence" (If the sentences themself are interesting... maybe it helps)

Of course you could go in a similar direction like the word play game... don't know if you have access for categories for "words" like plants or animals... where you could maybe give bonus points for words "falling into the special category"... 

Not sure in which direction you want to expand though :)