NHunspell suggestions not like WinWord

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C#

Hunspell lib. is not resulting like winword.

I have given input as "Pon" (Pond) but the result is not like winword ("Pun,Pond,Pony,Pan,Pen"). The "Pen,Pan" words are matching and the remaining all quite different (Po,On,Poe,Pen,Eon,Son,Ion,Pan,Non,Ton,Pol,Con,Don,Hon,Yon). Please have a look and update me.

Hunspell hunspell = new Hunspell("en_us.aff", "en_us.dic");  
List<string> suggestions = hunspell.Suggest("Pon");       

listBoxSuggestions.Items.Clear();

foreach (string suggestion in suggestions)
{
    listBoxSuggestions.Items.Add(suggestion);
}