sure, shore

Sure or sure means certain or convinced--
Are you sure that's the right number?
He was sure he had met her somewhere before.

Shore or shore ( rhymes with sure ) means the beach, or the land bordering an ocean or lake--
Let's go to the shore for the day.
They liked to visit the shore in the summer.
To a sailor, shore means land--
The sailors were always glad to be on the shore.
The sailors had shore leave for the day.
Shore also means to brace something physical by propping it up with a beam or post--
He tried to shore up the garage wall with some pieces of lumber.

Now that you know that, you can say--
"Are you sure this is the way to the shore?"

Note--"seashore" is another way of saying "shore"--
You might "see the shore", or "see the seashore", or be "sure you see the seashore".