“Cleanup” is usually a noun: “the cleanup of the toxic waste site will cost billions of dollars.” “Clean” is a verb in the phrase “clean up”: “You can go to the mall after you clean up your room.”
cleanup
“Cleanup” is usually a noun: “the cleanup of the toxic waste site will cost billions of dollars.” “Clean” is a verb in the phrase “clean up”: “You can go to the mall after you clean up your room.”