There's a invitation to contact the author with additions at the bottom of the page. I would if I knew what eel and hovercraft are in Urdu.
Source: http://advancepakistan.com/2017/09/20/hovercraft/ . Google translate works on both, but translates "hovercraft" as ہورچرک . The source was found by looking up the most common Urdu word (کے), and googling for "کے hovercraft".
"machli" and "hawai kashti" would do