Common words that rhyme with dark include ballpark, mark, hallmark, nark, ark, rark, remark, park, fork, work, quirk, irk, handiwork, dunkirk and pork.
There was a stark contrast present.
They noticed a peculiar mark on the wall.
A question can spark discussion.
He made a racist remark today.
The park was filled with cheerful people.
I need to leave for work now.