• cutdown,
• setdown,
• satdown,
• tdown,
• listdown,
• sitdown,
• leet down,
• lett down,
• let down,
• let downn,
• letdowm,
• letdowen,
• ledown,
• letown,
• lettdown,
• letdoun,
• beedgown,
• Setdoun,
• putdowm,
• putedown

• lead-in,
• let down,
• ledonne,
• lead on,
• leiden,
• leyden,
• ledum,
• leaton,
• leaden.

The adjective form of the word "letdown" is "disappointing".

The plural of the "letdown" can be the "letdowns".

The singular of the "letdown" can be the "letdown".