Common words:
* Capture: To seize or take possession of something.
* Captive: A person or animal held prisoner.
* Captivate: To attract and hold the attention of someone.
* Recap: A summary or review.
Less common words:
* Captor: The person who captures someone.
* Recapitulate: To summarize or restate the main points of something.
* Incapacious: Lacking in space or capacity.
* Precipitate: To cause something to happen suddenly or unexpectedly. (Note: While "precipitate" has a different meaning, it shares the same Latin root "capere" with "capture.")
These are just a few examples, and there are many other words that use the "-capt" root in different contexts.