Catches In The Act is a phrase used to describe when someone is caught in the act of doing something wrong or illegal. The two crossword solutions for this phrase are NABS and NAILS, both of which have 4 and 5 letters respectively. NABS is an informal term meaning to capture or seize, while NAILS is a verb meaning to firmly attach or fasten something in place. Both words can be used to describe the act of catching someone in the act of doing something wrong.