Startup Idea: Integrated Thesaurus and Dictionary in Word Processing Software

Startup idea to create an advanced word processor application which includes a high-quality thesaurus and dictionary as a side panel. The processor should have an automatic copy/paste feature to enable easy word selection while writing.

I am a writer and I use the Thesaurus included in Apple's OS. But it needs to be opened as a separate application and I need to switch between the two applications often as I am writing. Microsoft Word has a thesaurus function but it is mediocre compared to Apple's dictionary/thesaurus application. It would help me in my writing and save me a lot of time if a high-quality thesaurus and/or dictionary could be included in a word processor as a side panel so I could utilize it more easily as I write. An automatic copy/paste button would be especially helpful.