* Check (as in to examine or inspect): Cheque (a written order to a bank to pay a sum of money)
* Check (as in to stop or restrain): Cheque (again, the written order) or Czech (relating to the Czech Republic)
* Check (as in a mark or symbol): Cheque (once more!), Cheek (the side of the face), or Check (a pattern of squares, like on a checkerboard)
It's important to consider the context when choosing a homonym for "check"!