It's possible to customize the position of the as-you-type context menu so when suggestions are displayed the menu strip is located in a specific position. This example demonstrates how to lower the suggestions strip by 20 pixels so the misspelled word is not covered when suggestions are shown;

After InitializeComponent();

   Add this line

this.aytRichTextBox1.ContextMenuStrip.Opened += new EventHandler(ContextMenuStrip_Opened);

With event handler

        void ContextMenuStrip_Opened(object sender, EventArgs e)

        {

            (sender as ContextMenuStrip).Top += 20;

        }

Where aytRichTextBox1 is the textbox being spell checked.