Upvote this post if you want a "words" tab for Hebrew!
Sorry, but no matter how many votes you get, or how many times you post about it, a words tab is not coming to the Hebrew course. Only the first few courses made by Duolingo have them. Instead of that, why don't you try Tinycards? A lot of the lessons are included there already. Or Memrise? One of the contributors of the course made a memrise course that follows the Duolingo course and, in my opinion, is much better than the words tab they have here at Duolingo.
I do love the Memrise course - I hope at some point, the creator goes back and finishes it, since I don't think it includes all the words in this course yet. (Hope springs eternal, though!)