I was just going to create a thread for this. I’ll add my thought here.
Another nice to have feature as a plugin would be a dictionary/thesaurus. This could work by highlighting a word and having results in a separate panel, probably in the right sidebar.
Just another feature I found useful in writemonkey and if Obsidian would like to be more useful as a creative writing app this is a great plugin idea.
I believe writemonkey uses this