Difference between Cousin and Niece

What is the difference between Cousin and Niece?

Cousin as a noun is the son or daughter of a person's uncle or aunt; a first cousin. while Niece as a noun is a daughter of someone's sibling, brother-in-law, or sister-in-law; either or one's brother ("fraternal niece") or of one's sister ("sororal niece").

We hope you now know whether to use Cousin or Niece in your sentence.