The noun form of the word 'Learn' is -

• The noun form of the word ' Learn' is - Lesson / Learning. 

• Learning: the activity of obtaining knowledge:
বাংলা অর্থ : জ্ঞান; বিদ্যা; পাণ্ডিত্য।

• Lesson: a period of time in which a person is taught about a subject or how to do something
বাংলা অর্থ : পাঠ; পঠনাংশ। 

Source: Accessible Dictionary by Bangla Academy, Cambridge Dictionary.