Ask HN: Thesaurus as you type?

Is there a site that as you type words it provides you with similar words on the fly. For example, if I typed the word `accept` word choices such as `obtain welcome embrace ` would show up, just as text editors do with code. The whole point is to speed up the process and minimize friction. Contextual recommendations would be awesome. http://tranquillpoet.com/ is the a good example, except it does rhymes. Is there such a site/app/software?