Select the INCORRECTLY spelt word.

Lengthaning 

The incorrectly spelled word is Lengthaning. The correct spelling is Lengthening.

• Dormitories is the plural form of dormitory, which is a room or building where people sleep, especially in a school or college.
• Jealousy is the feeling of envy or resentment towards someone who has something that you want.
• Inauguration is the formal ceremony of beginning someone's term of office.
• Lengthening is the act of making something longer.