Add words controller with index and show actions

app/views/application/_definitions.html.erb

@@ -0,0 +1,12 @@
+<table>
+  <tr>
+    <td><b>Part of Speech</b></td>
+    <td><b>Definition</b></td>
+  </tr>
+<% word.definitions.each do |definition| %>
+  <tr>
+    <td><b><%= definition.pos %></b></td>
+    <td><%= definition.definition %></td>
+  </tr>
+<% end %>
+</table>