You didn't say which meaning of the word you wanted to use. Lash can be anything from a hair growing out of your eyelid to a blow from a whip. It's also a verb. Here are some sentences with a variety of meanings.
- Watch out; the horse might lash out with its hind legs.
- The captain used the lash on the disobedient crewman.
- I have a lash in my eye and it hurts!